I'm Confused....Help

So I had unprotected sex with my bf.....& I been on BC but the whole time while I was on BC I didn't have any symptoms of nothing, I was just normal. Now a couple of days after that I been feeling sick, back ache, nipple hurt, head aches on and off, & tiredness. But my period came it was late, but I was on for only 2 days...& I did Bleach pregnancy test & it frizzes up & foam a bit....& then I was like you gotta be kidding me, so I went to sleep & woke up & dos the test again & this time it did the same but without the foam...someone Help me& give opinions or suggestions...😞