Ovulation Calc My Last Period Was April 22nd. I Just Got Two Positive Pregnancy Tests!?

My last period was April 22nd. I just got two positive pregnancy tests!? - ovulation calc

I do not even have a complete cycle of birth control. So, I'm not sure whether to get my period. I have an average of 28 days for ovulation Calc. So I tried yesterday evening and got a positive result and another test this morning with a positive result. What are the chances that this pregnancy is a chemical? I have 31 days during my last period ... Please help!