Is my mind taking control over my body?

Okay so I was due to have my AF on 12th. Been a loooong wait , infact almost 3WW after AF is due! Had all crazy symptoms 1 week late. No AF and two BFN's. Started to relax. Told myself get over it and the day I convinced myself after another BFN voila started spotting. Told myself its start of AF as am already 2+weeks late. Now 3 days spotting And then Read all about implantation bleeding ( i know far fetched dreams) . Now symptoms are back itchy boobs, spotting, no AF and nausea. 
​My mind or body is saying something I believe! Any advice appreciated. Am i going crazy !!!!