Should I forget about thinking I conceived?

I was about 6-7 days late for my period, my bf and i had on my fertile days. Last night inoticed light pinkish disharge that didnt last long, it was less then spotting. Today I woke up and i gues my period came. This period feels very different. I have felt sick all day like wanting to throw up, and my advil and robaxin did not work at all i feel a huge pain in the middle of m uterus that wont go away! it doesnt feel lke my normal cramps at all and i get cramps bad. The blood is very ver red by the way, more red than usual! like cherry red ...this is different. I know i dont have a stomach bug or anything. My friend said she had a normal period when she got pregnant but missed her next months period and found out he was about 2 months..any advice or same experience?