Ewcm with spot blood 11 or 15dpo


Ok so temps are on the down which I assume af is coming as il have been getting bfn tests but today I went toilet and when I wiped I had a blob of ewcm with a tiny dot of brown blood. I never spot normally when af comes it shows on tissue but nothing like this. So ff has me at 15dpo and premom has me at 11dpo both with different coverlines. Thoughts?