Bleeding between periods?!?

Hi guys,

About 10 days ago I started bleeding. The bleeding started 8 days after I finished my period. I’m not on any contraceptive, I don’t suffer from PCOS or endo and I’m not pregnant. The bleeding is more than spotting but not a period as there are no clots or heavy bleeding and it is fresh red blood. This is the first time this has happened and I have booked in with my GP for next week. Just looking for some advice?