Stomach pain?

My husband and I have sex and right after because he came in me I cleaned up and I was bleeding. Weird because I got off my period a week prior. Then I wake up that following morning with intense lower abdomen pain. Like shooting pain, it has me full force forward in almost tears. But it's a fighting sharp feeling. My period has been regular since my miscarriage in August and no positive tests, we are both clean (tested just a few weeks ago) no new partners. It's new and random.. But this is what happened with my miscarriage (I was 9 weeks and I had my periods, never had a positive test until one day I got awful pains and the following week my cervix had opened and naturally miscarriaged) Can anyone else relate and tell me I'm not crazy? Please. Idk why this has been happening to me.