pill question

Amelia
So I've been on the pill since August ... I've pretty much taken it regularly but I've been hours late before or have missed days and ended up doubling up . After my period in November my boyfriend and I did not have sex at all during December just do to not being together as much or being out more often .. my period in December wasn't normal .. it was like 3-4 days (I usually bleed hard for 7) and was light ... we use condoms every time ... we've had sex 4 times since my December period , 3 protected, 1 was not .. with the 1 not being protected I took "take action" the very next day because I knew I hadn't been as strict with my pill. (Unprotected was 3 days ago btw) so today I started bleeding when I wiped but when I took my tampon out it was brown. With very little red ..?? I'm cramping lightly . But I'm just curious have any of you had brown discharge the 1st or 2nd day of period .. what should I do? PLEASE HELP!