Cd50 last test I'm taking what do y'all think

I'm on Cd 50. fertile week was may 2-8 had some very light spotting 13-14. Acne,fatigue,backache,cramps,nausea, I thought for sure I was pregnant again. Have taken 5 tests in the last couple weeks and nothing. My dh says no more tests give it up your not pregnant.Think this may be an evap? Do y'all see anything.