First of all, I'm sorry to welcome you to Pet Talk in such a manner as this. I wish it was under happier circumstances. It's so difficult to lose one of our furkids; most of us on PT have been there and it never gets any easier.

Obviously, I can't know for sure but it sounds as though your kitty may have had a seizure of some sort since you say that there was blood on his mouth after having bitten his tongue. This is only a guess, of course. However, if he'd been having problems w/vomiting for that many years, it could have been something else entirely. I wish that I could be of more help but more conjecture on my part probably would only add to your pain rather than help w/it.

Please know that prayers are going up right now for your peace of mind. Your kitty is already at peace at the Rainbow Bridge, living the good life w/no health problems whatsoever and he knows and appreciates how you held him and rocked him before he made his passage. Your reunion one day will be so sweet. Hopefully, that thought will comfort you until you meet again. (((HUGS))) to you and your daughter.