Am I pregnant?

Cameron
My period is late by 19 days, me and my boyfriend had unprotected sex the day before I ovulated, he pulled out though. I took two home tests on the 11 and 14 days my period was late both were negative! My last period was late by 4 days and I weird brown spotting for two weeks after. What is happening to me? Did I just ovulate late since I had brown spotting for two weeks? or am I pregnant? PLEASE HELP