During Sexual Intercourse My Lubricant Is Brownish In Colour. I'm

During sexual intercourse my lubricant is brownish in colour. I'm on the pill. There is no odour, pain during sexual intercourse. When my boyfriend fingers me, the mucous should be light in colour but in the last 6 weeks it has been brownish... I finished my period a week ago so definitely not pregnant. No spotting after sex or any pain.