Help please!

Erika

I don't know what to do! I'm on the pill but I forget to take it sometimes and I'm sexually active. My period is supposed to come in two weeks but yesterday I had bright pink spotting and today it was brownish but only when I wiped myself. Could this be implantation bleeding? Should I stop the pill until I can test for a pregnancy test? And If so when should I be able to test and get an accurate result? Please help!!