What Causes A Prolonged Period While On Birth Control Pills?

Hi, i was on microgynon for about 7 months and stopped taking it for around 6 weeks to see if it was affecting my moods. I then decided for contraception reasons to go back on it and waited until my period started to begin the pack. I had a heavy period for about 2 weeks and i am still bleeding/brownish when i wipe after going to the toilet. Is this normal? im currently travelling and feel concerned being so far from home.

Thankyou.