It seems counter-intuitive or wasteful to see your doctor even when you’re not sick, or at least not feeling sick, however there are routine checkups and physicals that medical staff perform to make sure you’re not sick with something that you aren’t feeling symptoms of. You might not even know you have lung cancer until they do an X-Ray of your chest.
Seeing your doctor regularly helps prevent you getting bad off and will help improve your overall health because you’re seeing the doctor for checkups to make sure your blood pressure, cholesterol, etc are all under control and making sure you have other areas of your health all peachy.
Just because you feel fine, doesn’t mean you are. It’s also perfectly fine to talk to your PCP about your mental health, if you’re depressed, suicidal, seeing or hearing things that aren’t there, or letting them know you often forget things too easily, too easily distracted, etc.
Also tell your doctor about all medicines you’re taking, including all OTCs including yes even multivitamins, cold medicines, etc. Also give your doctor the information about other professionals you see such as audiologists, ENT’s, surgeons, wound care, psychiatric, etc so they can get records from one another and help work together to make sure you have the best possible care and that they’re not giving you any medications that conflict negatively with one another.
And as I’ve mentioned before, keep a portfolio of everything.