So question... here lately i havent had no sex drive what so ever and my fiance has been VERY…

So question... here lately i havent had no sex drive what so ever and my fiance has been VERY PATIENT! & this morning i was in suchh a good mood for it so we done it, but every since then i have been hurting in my lower abdominal , my lower back hurts like crazy an cant get comfortable & when i sit down wether its in the car, a chair, the bed it feels like something is stabbing my spine. Does anyone know what this could be? 🙁🤔😩