Late period, negative pregnancy test & brown discharge

Me & my boyfriend have unprotected sex but he always pulls out. However my period was really late, so when it was 21 days late I took a clearblue pregnancy test & it came back negative. I still didn't get my period so I tried taking another test 6 days later & it came back negative too. So I decided I was just gonna wait for my period to come, I thought maybe I was just stressed & that's why it was held back. When my period was 33 days late I started noticing brown discharge when I wiped at first it was really light but now it's my third day & I'm still having brown discharge now with brown blood clots. My cycle is always around 30-34 days I sometimes do have irregular periods my longest cycle had been 54 days but now this time it was 75 day cycle. I sometimes get a bit nauseas, I've also noticed that I have a little bit of white discharge from my breast too. I don't know if this could be pregnancy or just my hormones out of control?