Hi Joanie,
I feel for you. I too have a man who has been to the brink of hell and back with medical issues and I know where you are at. It is very possible that your husband is suffering from depression as a result of the surgery and other medical issues. You can read more information about how to work around the depression here in the depression database. No matter the cause of the depression, this information will help you ask all the right questions. Some things that have been known to help depression are: Medical massage. You can read an article from the Archives of Surgery here about how massage can sometimes aleve pain after surgery.
Since he is seeing several types of doctors (podiatrist, urologist, etc) you want to make sure you keep an accurate record of everything your husband is taking, all his meds whether they are prescription or not. Even vitamins and suppliments. Make sure you tell your doctor everything so he can watch for and warn about interactions. You can read about the drugs commonly prescribed for pain here in the chronic pain database. Here you can read about Lyrica. Here you can read about Lexapro. Now Lexapro is an antidepressant. Lyrica is used to treat nerve pain, like that of a diabetic. The two of these together might be questionable and you want to make sure you ask your doctor about any interaction between them.
As far as your husband's PSA and his return to the doctor in September, April to September is only 5 months and it is possible your doctor feels that is soon enough to see yous husband. If there is an issue that you think warrants seeing the doctor sooner, then you should. I hope this helps somewhat. Please do take care of yourself and your doctor. I hope all is well.
Vicki M