what's going on?

Hey guys, two days ago I wiped and had the faintest pink on the toilet paper, and no more after that. Then today I have a bit more than before and it's brownish. I'm also cramping today. I'm on the pill, 2 hormone pills left in this pack to take, so about 3-4 days away from the start of my period. 
Just wanted to know any thoughts you guys may have because this hasn't ever happened to me. Currently waiting on a call back from my doctor to speak to her about it. Any insight is helpful! Thanks!