My Periods Starts On 21 Feb Ended On 25 And

My periods starts on 21 feb ended on 25 and I had 3 times protected sex and after that 4th time had unprotected sex in 12 hours on 28 Feb and on 2nd march I see pinkish brown discharge and now on 8th march I see discharge form my nipple and in between I also had anameia so my que is ,am I pragnent of is it bcz of anameia