Sorry you've been feeling poorly. Talk to your doctor about that. Your one time sex almost two decades ago with condom shouldn't worry you. Nor sex with your long time partner, your wife. The hospital transfusion also shouldn't worry you at this point in history. Can HIV be transmitted via a blood transfusion? Yes. But again, this is extroidinarily rare in today's world. People are screened, blood is screened, steps are taken to make sure this doesn't happen. There is zero reason to believe you had a transmission. If you have health anxiety, do you see anyone for this? Exposure therapy is really helpful for intrusive thoughts of anxiety, so I've read.
If a condom fails it rips down the seam so that didn't happen or you both would have noticed it. 40 years ago you might have gotten hiv from a blood transfusion, but not today - hospitals and the blood supply system aren't that dumb because lawsuits would be crippling to them.
Move on back to your happy life.