I dont .. will it harm me... plz read d details below...?

hello i m in mid 18... i neva d.... i tried twice coz ma friends forced me... bt no sperm came out... i also cant retract ma foreskin... is it due to nt ???? plz help me.... m really worried coz i cant retract ma foreskin.... if ne1 knws good ans plz contzct me in swine_nat@yahoo.in.... i ll b waitin 4 good answers.. thank u....