TMI - discharge?

Sorry. I don't know how to make this as TMI where it blurs the pic. I'm a FTM and I'm 39w2d. I noticed this brown stain on my panty liner and I'll be honest, wondered if it was a skid mark (sorry tmi!!) but the placement of it is directly underneath my vaginal opening so i don't think it's from my butt. Anyway, when I noticed it, I went to wipe but nothing was on the toilet paper, just on the panty liner. I have been having more intense Braxton hicks today that are painful but no real pattern. I have NOT had a cervical check yet nor have I had sex in several weeks, so I know this stain is not from that. I should also note I haven't had a bit of discharge whatsoever this entire pregnancy, not even clear. So no mucus-y discharge that I can tell. Just really confused what this means. I admit I am hoping it's the start of bloody show but it's just so brown and no mucus that I can see and nothing when I wipe so I'm confused! Any ideas??