Pregnancy test

So me and my boyfriend had sex on march 9 (protected) and 11 (unprotected) and then i had my period by 11 -16as well. After that we had sex on march 19 which was unprotected at first but we put a condom later on we also did it at april 1 but it was fully protected.

I had my period for april 9-14 ( we also had intercourse on april 16, it was unprotected like 3-4 strokes then a condom was put on)

I noticed after my period for april my breasts were still sore and heavy and full, my lower abdomen started cramping too and producing brown discharge. I was nowhere near ovulation according to my app. I took a test on april 15-16 and it was negative. I took a test now at april 20 which is also negative. Any thoughts if i could be pregnant?