Help!! Random bleeding?

So I’m on the combined contraceptive pill, and take it for around 3 months continuously before having a break/bleed (which my doctor said is fine!) I’ve been on this particular pill for say 6 months, only this past week and a half I had brown discharge for a good few days, before it’s like a very light period. It shows on toilet paper, but not needing to use anything. It’s been almost two weeks and it’s still the same and I’m getting worried.

Has anyone experienced this/know why this is happening? I don’t have a history of spotting or anything and I couldn’t be pregnant, just for the record :)