Help!

I have been on the pill for about 8 months now but for the past 5 months, I've started spotting everyday 15-10 days before I'm supposed to actually get my period and I also get cramps when I start spotting. After the 15 to 10 days, I get my period and it's just as heavy and long as any other regular period. I have told my gynecologist 4 times within the past 5 months and each time she just says the same thing "let's just wait it out!" but this just doesn't seem to be normal. Maybe this pill just isn't right for me but if anyone has an idea or advice, I'd really appreciate it!