Spotting but not pregnant & no period?

Hey all! I’ve been spotting since Tuesday, & I’ve only noticed it when I wipe, there’s never any on my underwear. It’s light pink w some brown SOMETIMES. There’s no way I could be pregnant so that’s not even a concern. I’ve never spotted before my period a day in my life, which is why I’m so confused. I’ve been stressed out a lot recently from school, but idk if that could effect anything? I’m not sure. What do y’all think? 💗 No mean comments please!

Update - It can’t be my period Bc I always have sore beasts at least 2 weeks before my period & my breasts are not sore..