Quick question - light bleeding after sex??

Hope • Baby girl 08/05/15 Baby boy 11/28/18
I am on cd 25, AF not due for another 5 days at the very least. Never comes early, only late. According to my chart I am 8dpo but could be more along the lines of 9 or 10. Had intercourse last night and now today only when I wipe I have discovered discolored discharge, like a slightly tinted brown. Again, only when I wipe sometimes. The last few days I have been having pelvic pain and a pain that radiates from my left hip down my leg. Kind of odd and definitely not anything I have felt before. Also, pinching and pulling around my belly button. I haven't been symptom spotting because that just lets me down in the end but I mention these because they happen out of no where and are noticeable.
Thoughts??