Light brown discharge tmi?

I'm currently about 10dpo according to glow but have been getting a light brown discharge but mostly only when I wipe after using the toilet. There's been a small amount yesterday during the day. Any ideas what this could be? I'm hoping it's not AF as we BD all the way throughout my fertile week and I don't feel any AF symptoms (I usually get bad acne and cramps beforehand). Any ideas ladies?!