Can I be pregnant? Of pcos or pregnancy?

I visited my bf on 24th Oct ...my lmp was from 20-23rd Oct. We only had oral sex...but he ejaculated near my vagina...I washed immediately and then after 6 hrs consumed unwanted 72...everything was fine but on 30th October I got little bleeding with some clots...it was not brown...it was bright red ...but little in quantity...this continued till 1 november...and after that I have been quite unwell. I was getting dizzy spells very frequently... Back aches, sore boobs, bloating and all the symptoms of pregnancy....did 4 pregnancy test between 18-25 nov....all were negative ..I visited a gynaecologist on 24th november as I had very bad stach cramps...she did an ultrasound... And I was diagnosed with pcos...I was shocked ...I never knew I had this problem... I was pretty regular...I was late for period but I got it on 2 nd December...it was like my normal.period...but all those symptoms won't just go away :( ...Although I ahd my period...but are the symptoms because of pcos or pregnancy??