Sex , Vagina Tightness

Okay So It's Been Jan 25,2017 Since I Had Sex , And I Just Had Sex But Why Does It Hurts When U Have Sex All Over Again For The First Time ? But It Kinda Hurted Tho Does That Mean I Have Cervical Cancer Bc It Hurt When He Was Thrusting Against Me? I've Lost My Virginity When I Was 18 , But Why Does It Hurts When You Have Sex For The First Time Again ? Does Your Vagina Tightens Up Or What ? Please Give Me Some Answers , Thanks