I had protected sex with my boyfriend on october 9th woke up the next day and started seeing brown flakes in my vagina while wiping today is day 2 and im still seeing the brown flakes (looks like dry skin) what could it be? (havent had a period yet?

It is not feasible to provide a meaningful opinion without examining you. The "brown flakes" could be due to bleeding from the trauma of sex. If it disappears in a couple of days, you could ignore it. You may try using a water based lubricant like K-Y Jelly for sex. Get HPV and Covid vaccines. Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines