For a decent amount of time i've had a substance almost falling out of my penis. It only happens once in a blue moon, and its been a white color and it happens before im about to urinate. Its only happened like 3 times over the last year. The reason i've not been concerned was because I thought it was left over semen in my body or something. I have no pain when urinating and I noticed a clear substance in my pee when after I was done straining. Should I be worried and should I go see a doctor? Also, i've had a yeast infection from my girlfriend before before she knew she had one. Could that be what the cause is and I just never fully gotten rid of it?