Hi! I had my period last September 19 and ended on September 25. I am experiencing irregular menstruation because before I had my mens. on Sept., I also had 3 months delayed of mens. Then after my last period on Sept. 25, me and my partner had our unsafe sex because we are trying to conceive. Then based on my FLO tracker, October 2 is my ovulation day, so it means i have a high chance to get pregnant. We have our unsafe sex with my partner but after few hours I noticed a brown spot on my underwear and when the days had passed its getting reddish brown and it's not just like a spotting but bleeding but not like I am having a menstruation. Today is 4th day of my bleeding. What could it be???Can someone explain it to me??Thank you.