AF due tomorrow, 3 BFP's and vagina/cervix cramps

Kyleigh
After feeling extremely nauseous and dizzy the past few days, I decided to test and got 2BFP's yesterday and an even darker BFP today... however, I have been having vagina/cervix/period like cramps the past couples day as well. My question is, are these cramps normal for 4 weeks? I'm praying I don't have another chemical pregnancy, because I had one in September but my positive tests were very faint and these are darker. The top 2 tests are from yesterday and the bottom is from today.