Brown Discharge for 3 weeks

Hi guys

I’ve been on the pill for nearly 3 years with no problems.

The other day I had the flu so went into antibiotics. Didn’t have sex as the pill can become ineffective while on antibiotics. So didn’t have sex for 2 weeks. But for three weeks after I finished the antibiotics I have had brown discharge and quite a lot of it. I still have it. And I have nearly gone through a whole sheet of pills since antibiotics!

Other than starting a new sheet and getting perfect on time taking of the pill, I don’t see how this will go away?

Help!