Letrozole question .

Brittany
So this month I went to see a specialist. My doctor had me on letrozole everyday.my need doctor took me off it everyday and only had me taking it on days 3 to 7 during my period. Today I had some pink/red blood when I wiped. I haven't taken the letrozole in about 2 weeks.my period isn't due till Saturday..is it normal to bleed early? I really thought I'd be late because I stopped the medicine! Helppp