RIP my dear Ace (my puppy)

Ace was giving to us by my mother in law to my kids for Christmas. He is a Yorkie 3 months old when we got him. Let me first say that I am not a big animal lover at all. We always had animals when i was younger and never got attached to him. But here comes this little puppie who we named Ace and I fell in love with him. I treated him as my child. This dog was sick from the get, my mother in law brought him with a cold so they say from a pet shop but who knows. He did not show much signs of it getting worst later on, but comes a week ago and he begins this cough sounding like he has a fur ball in this throat. So I look it up and sounds like he has kennel cough, but keep in mind that we don't have other animals. long story short, today I stepped out for two hours or so, I came home and Ace did not react as he usually does he was just laying on his bed. I ran to the bathroom to pee sorry for the extra info. a thought came to me saying I hope he isn't dead, I will freak out. Then I pick him up and he seems weak, so I put him on the floor and sat next to him and said
"come Ace" and he wouldn't he just sat there looking at me with a sad look and I noticed he was breathing deep. I am very familiar with this because me and my children suffer from asthma, so i pick him up and he begins to breathe hard and making noise and i felt his heart slowing down as he closes his eyes, I said "Ace stay up" and he will breathe harder and the heart will pump and slow down. I looked at him and saw my daughter who died years ago, who also stopped breathing in my arms, I called my husband but he was at work on a brake. I then called my mother in law and was told to meet her at the vet. hospital, and I was scared that he will die on me while i got to the hospital. But I took him as I am in the cab he is vomiting the whole way there. But in my head he is still breathing barely but breathing, I kept speaking to him to keep him alert. Once we arrived my mother in law was there waiting and we took him in and the doctors quickly say we are going to give him oxygen and put a IV and that will be 400 dollars in my mind i was like damnnnnnn but go do what you have to do. We chatted in the waiting area and the doctor comes back and asks some questions about his past history and then says we need to take a xray and that will be a additional 175 dollars and I said okay in my head I said omg what the hell !!! we chatted some more in the waiting area, then the doctor comes back and sits us down and tells us that he has pneumonia, and that he is doing really bad, and he needs to be admitted to the hospital for a couple of days which will cost roughly 3500 dollars i quickly said omg that's more than twice my rent, insane!! ! she said i know i know. I began to cry. My daughters dying struggles came to me all over again. So my mother in law began to say we can work it out with the money I said no Sharon none of us have that kind of money and he wont survive. So i asked the doctor what is a ratio that she has seen dogs survive this, she couldn't give it to me so that was enough for me to make the decision to put him to sleep. My mother in law was still struggling on not giving up, but I said Sharon am not giving up I am being realistic he is struggling and suffering and we will suffer more. I can not emotionally take it, the loss of my daughter no one that has lost a child would understand, and I am not speaking about a miss carriage I held my daughter, she lived 7 months. So the doctor comes back into the room and asked us if we made a decision and we both stood quite and she said he is really suffering and i said we have to Sharon he is in pain, that is when she said fine lets do it. the doctor asked if we wanted to say bye to him and be there when they put him to sleep i said yes to both my mother in law said Annie no! make sure! I said no i want to. But when the doctor brought my puppie who looked in such pain and sadness in his cute face I couldn't be there when they put him to sleep. I rubbed him for a few and thought to myself saying I am sooooo sorry ace. I cried uncontrollably. I cant understand everything that first comes into my life dies, first my daughter and now this dog. I am happy that my two children are here with me in good health because if i was to ever loose one of them, I will go crazy. I dont think i can handle another death of a child. I cant take someone or something to stop breathing in my hands again! this is something that I wont ever wish on anyone. Well I just wanted to put a little something on today's ordeal, RIP in ACE. We will miss you.