Moms... could I be dilating?

I’m 35weeks. My husband has been out of town for 3weeks- so no, I didn’t have sex recently.

I just went pee, wiped and was very tender. I wiped again bc I thought I saw a spot of discoloration. On the second wipe there was clearly a darker discoloration (slight brown) mixed in with my cervical mucus. I am a little crampy this morning, and have my standard back ache.

After googling I think I may be beginning to dilate...I know I can walk around for weeks at 1,2,3cm dilated.