Hi, I just saw your story and as a Heart transplant recipient myself I can relate to how transplants can change someone. I remember early in my treatment that I was a bit short tempered the first few weeks after transplant. For me it resolved itself when I reduced my medications down from the high levels I started on. Prednisone is the culprit for mood swings. Luckly for me I was able to completely get off of that one. If he is still on it, it may be a factor in his mood. I would suggest if He had his transplant at mayo for you to contact the social worker dept. Im sure His Doctors would like to know your concerns. I know my team asks about my wife at every visit. She joins me most of the time but due to some Hip surgery it has become difficult but this last yearly visit she joined into the conversation by cell phone. So my prayers are with you and as someone else said God knows your situation. Prayer is a powerful tool that you have at your disposal.
Blessings