I have a non cercumcised penis and ive never streched my foreskin back way past my knob, if i had sex now what would happen?!
It would probably get pushed back. The problem is if it is too tight, it can get stuck or the frenulum can tear. You need to work on retracting the forskin. I would recommend looking at teh Male Anatomy thread and reading through the Forskin forum first. Then come back and ask any questions.