I have emdometriosis I've been on the pill for 10 years and have started to get a browny discharge and an odour can anyone tell me if this is normal or if you no why its happening

Please see your doctor as this does not sound right. The brownish discharge is essentially old menstrual blood. The odor needs to be addressed as you could have a candida yeast infection on top of this or it is just the endrometriosis back again.

I take the pill witout a break as advised by my consultant so I don't know if the discharge could be old menstrual blood

Dear, it is old menstrual blood. What that means is the blood was not immediately discharged from your womb and is coming out "late". That is normal.

What needs to be addressed is the odor. Please see your doctor and get to the bottom of the problem as any kind of odor means there is something wrong.

But I haven't had a period for the last three years so how can it be old blood