Im experiencing some changes which i can't explain.

Im going to the bathroom very often, im sometimes dizzy,not so hungry and when i do get hungry im always hungry.

My stomach is hurting and it was running for a little while and now i have to force a bit to go.I had sex on the 5th ,7th and i was supposed to ovulate on the 9th and had sex also.. its to early to create a panic about being prego....what should i do?

Thx