11dpo and spotting?

Mia
Today I am 11dpo. Woke up with some cramps and go to the bathroom very light pink spotting when I wipe. Lasted just this morning now there's not really nothing. Yesterday 10dpo had yellowish CM. I thought I was out because my other symptoms (bad nausea at night, cramping, sore boobs) all seemed to VANISH the past day and a half or so. Now my boobs are sore again (not sore to touch, just all over sore) and head is hurting pretty bad. I tested this morning and BFN with First Response 6 days sooner. 
I'm wondering if anyone has had vanishing symptoms during 2WW that came back? I hope this isn't AF being sneaky!