Need advice!!!!! Maybe TMI...

Me and my fiancee TTC but haven't had any luck.... Here lately I've had some weird feeling in my stomach. And heartburn. My headache are coming back more severe and frequent. And been feeling a little nausea like every other day. And the past few days we've had sex when I've had the urge to orgasim I'd have a cramping feeling in my lower abdominal stomach. (Never had that happened before.) And my boobs have been tender all over the past week. And even after ovulation I still have sharp cramps in my lower abdominal stomach. Any advice lady's really don't want to waist money on pregnancy test just to get a BFN and be disappointed again