Brown discharge? Pregnant? Birth control?

My period isn’t due for next 11 days. I’m on pills and last time I had sex was on 31st, unprotected and he didn’t cum in me. I also have pcos and cysts on right side ovary. I masturbated two days ago and realized later that I had long nails so it could’ve caused cuts. But that was two days ago. I have no cramps at all. Today I got extremely light brown-ish discharge when I wiped. Its really light but idk what it could be. Any ideas?