I’m so done

I need some serious help guys. Advise, prayers, whatever you can give. I lost my husband suddenly and unexpectedly 7 weeks ago. I found him when I got home from work. Since then, my dog has went from super sweet and cuddly to aggressive and snappy. I’m trying to put him in behavior modification training. It has only been a week, so it is too early to tell how it will go. I know that if he doesn’t get better, I will have to give him up. I can’t let him bite my 8 month old. However, I’m already broken. I’ve had this pup since he was a puppy. I don’t know what losing him will do to me. I feel like I’m barely holding my life together as it is. I will break if I can’t keep this dog.😭😭😭