Belly pain after sex

Vic(Tori)a β€’ Proud mama to the most precious little princess πŸ’–πŸ’– trying for #2

So I'm 10w 2d. My boyfriend was gone for 5 days and when he got back we had sex twice in a 24 hour period. This morning after we finished, I've been feeling a tightness/pain that kinda wraps around my lower abdomen. Is this normal? Any idea what it could be?