Hello im a 16 yar old kid and i ned some help..i dont no much about the penis and so im not sure if its normal but it all started a while back and my penis was being very sensitive to cold and yes i know the penis shrinks when cold but it really gets small and tight but anyway after that now under neath the foreskin on my penis there is the white substance that was there but i cleaned it now so it seems better but it still sometimes comes back right underneath the top part...also lately when i ejaculate its like delayed for a second or 2. also the rim on the top of the head of my penis is kinda purply color and a bit tender.and another thing im not sure but this ridge felling thing started to appear a while ago like just past where the head rim is (towards me) and its a tiny bit visblke when i have a full erection ....but anyway plz let me no of these symptons and if they are normal or if i have an infection plz cause im scared and very embarrased and im nervous about meeting girls etc so anything would be appreciated thx alot