I'm so embarrassed to even do this , but it's been going on for to long . i started noticing my penis staring to get smaller when it's soft , but when i'm erect it's not to bad . and also i can't last more then a minute or two everytime?

This (small penis) is not an unusual perception but it is only a perception. Premature ejaculation is best managed by having an understanding partner. For the fear of it and disappointing the partner causes self consciousness, and recurrence in a vicious circle. have sex with confidence with an understanding partner and you will break the cycle. If not better then see a sex councilor or a Urologi