I had unprotected sex on May 17,18 and 20th, according to my phone app I was ovulating on the 17th. I was supposed to get my period on the 27 which it didn't happen and until yesterday I got my period. Before getting my period I took a pregnancy test and it was negative.. I don't know if it's too soon for an answer. Could I still get pregnant or am I OK since I got my period?