Light Brown Discharge after Orgasm

Yesterday, after clitoral stimulation only (no penetration) I orgasmed and then after when I went to the bathroom and noticed some light brown discharge. It was very light. I put on a pantiliner and there wasn’t anything the next time I went to the bathroom, but when I wiped there was just a little bit of light brown discharge again.

Should I be concerned? I have an appointment already scheduled with my doctor on Friday, so I thought I would just monitor today and see if anything changed.