It pains me to say that he did regurgitate overnight, and passed away as well. I'm assuming the severe stress of regurgitating was just too much for him. Or maybe it was something else. I'll never know without an autopsy, and hes been dead for who knows how long already.
Thank you all for your guidance and support. This all happened so fast over the last day... I thought I would have more time, as he had been declining but not acutely. I have a lot of guilt, sadness, and regret right now. I wish I had caught on sooner, and perhaps at least spared him some pain.
Have a good Easter Weekend everyone. Thank you for your time.