Brown Discharge?? TMI PIC

I'm 32 weeks today, and I went to the restroom just now and had brown discharge or brown blood?? There was really no red, just brown. It only lasted for about maybe 10 minutes and now it's only just a smudge when I wipe. I haven't really had a lot of any type of discharge the whole pregnancy so I'm a little worried. I'm not in any pain and I feel my baby having hiccups and just felt her not too long ago. But can anyone tell me what it might be?? It wasn't 
 thick thick to where I would guess my mucus plug.