Need advice !!!!

I have been actively trying to have a baby well I recently got my implant removed in June ! I have had two periods they have been pretty painful but I just figured I'm getting back into routine ... Well last night I was cooking dinner and I started to get extremely dizzy and felt I was blacking out and it was such an overwhelming feeling because I could not stand up for long periods of time ! What could this be why would I feel this way ? Then also last night me and my husband was having sex when all of a sudden I started having a lightening sharp pain that was in my lower stomach !!!!? What is going on with me ?