A Lot Of Spotting?? Help!!

I've had quite a bit of spotting on and off for about 5 days. It has been brown but today there were hints of red in it. I've been on the pill for about 20 days now so maybe it could be my body getting adjusted to the hormones? I couldn't be pregnant nor have I had rough sex that could cause trauma from that. Any advice, tips or personal experience you'd like to share is absolutely welcome. :)