confused??

I was diagnosed with pcos 4yrs ago. I stopped taking my metformin around Dec, mostly because I forget about it and I never felt like it was helping. I've done 7 rounds of clomid 50mg and periods have been regular for a year and have been ovulating on time with app. I ending up taking a pink dye test 10dpo and seen a vfl, even asked my sister to verify I wasn't going nuts. since it was early I decide to wait a few more days before resting and to see if AF would show. AF ended up being 4days late so I tested with a blue dye test bfn 2 hrs later I started spotting. I had what seemed to be a very light period for 3 days (way shorter than I've ever had). I was having what I thought was pregnancy symptoms before I took the 2nd test. sore/tender breasts, lower back pain, slight cramping, mood swings, fatigue and nausea. a week and a half later and I still have them, just slightly worse nausea and mood swings. I've been pregnant twice before, 1 10yr old and 1 miscarriage, and felt like this with both. but when I took another test yesterday bfn. could this all be in my head?