Spotting between Aunt Flo...

Caitlin • 24 - PA - Happily Married - TTC#1
Thursday the 3rd was the last day of my period. I began spotting on Wednesday the 9th and I'm still spotting. It's going on a week now, what could this be? It's not accompanied by pain - I do get some light cramps but nothing severe. It's not heavy enough for a pad/liner/tampon. Just when I think it's going away, it's back. It's not bloody every time I wipe. Sometimes it's really red and sometimes it's brownish red.. Any help would be great. I want to call my obgyn but I feel like it's going to end shortly?