I am 23F and lost my virginity about 2 weeks ago. Only had sex two time with just half of him inside me. During the first time sex, it hurt when he push in the head, the he push deeper and I felt that whole vagina stretch a lot and too deep inside me, like whole penis fully inside me. When I move my finger down, OMG he just less that half of it inside it. I am so scare and ask him not to go any deeper. What wrong with me? Will it cause me stretch more when he fully enter? We had a lot of foreplay and use lube.