Brown Discharge?

Samantha
Alright, so I just need a few opinions on this bc it's kinda worrying me. I've been on the pill for about 2 years now and I'm pretty good at taking it everyday at the same time. Though, 2 days ago I did forget so yesterday I doubled up and took both so I could stay on track. Anywho, I'm supposed to start my period in about a week and a half (I haven't had sex in 3-4 months bc my boyfriends in the Army and he's stationed elsewhere, and we always use protection) and I've been having cramps and brown discharge. I have had yeast infections in the past so I'm just curious if that's what it probably is.