Sex pain

I just lost my virginity about 2-3 months ago. Everything went great , I didn't even bleed, and it slid right in. Sex has been good just after I'm still pretty sore. Like throbbing. Idk if its cause I'm still new or cause he's huge.

Also sometimes when in a specific position it hurts more and sometimes I get a sharp pain like he's hitting a wall or something... what is that?

Btw I'm 21 , so I'm not a young teenager. Lol