8 days late on my period

Hello I’m 22 and I had my first baby boy when I was 19 and then last year I found out I have pcos or so the emergency room told me with a vaginal ultrasound.

So today I’m now 8 days late on my period. I took 4 tests 2&3 days after I had a very light bleeding that lasted a few hours everyday for 3 days by the 3rd day it was very light brown( the dates for the very light bleeding was 13th-15th). The tests I took were negative and the emergency room visit on Friday (the 18th). Well I’m currently experiencing all the early symptoms to being pregnant, emotional, lots of white discharge( to the point I thought I was bleeding super light again), exhausted, swollen breast’s, hungry 24/7 and getting nauseous after eating anything, I have a line down my stomach and I mean from my ribs to my cesarean scar.I desperately need advice…..