anyone testing early?

Rebekah

last night i had cramping that was a bit more intense and stuck around all night and I also had very light brownish spotting with cm. cramps went today but have come back this afternoon. im 7DPO atm and af is set to arrive on the 28th if its on time. could I possibly test tomorrow and maybe have a chance or a faint line turning up? anyonr else doing this? plus I have been more tired and sleeping horribly for 2 nights in a row plus slight nausea.