Pink spotting CD 17.

I just stopped birth control a few weeks ago would this be ovulation spotting or is it just breakthrough bleeding? Its very light and only when i wipe. Havent gotten a positive ovulation test yet either. I think todays was dilluted too because i couldnt wait until the 4 hr mark to pee 😔 ive been testing with the clearblue digital (the 2 most fertile days one). Is it possible i missed a surge? We were on vacation last week and i couldnt test last monday-thursday so basically almost all week was missed. ***adding this. Ive also been getting TERRIBLE headaches for the past few days. Even tylenol wont help.