TTC for 2 months...using clearblue easy fertility monitor....got AF for 1.5 days....verylight...then spotted once 2 weeks later (never ever happened b4)...took HPT and got neg....still testing with monitor...day 16 and still on low fertility level...usually on high by now..and peak on day 18 of cycle....would being pg cause fertility levels to be low all whn testing? any advice would be appreciated!! I am confused because the test was neg...but have cramping and very tire..heartburn...queeziness!!