i just dont understand!!!

so this is my 1st time posting on here, but i felt like what better place to vent than on here with other people that are goin through the same thing as me. so heres the deal.... my husband and i have been together for goin on 10 years and been ttc for the last 4. but really tryin hard for goin on a year. when i found this site i thought id hit a gold mine. thats been over a year ago.. and its always been dead on about when AF was goin to show her ugly face. i mean its always on the day it says or no more than 2 days before. NEVER after.. so the 1st day of my last period was Jan. 25 2011. ovulated (according to the site) on Feb. 6. next period was suppose to start Feb. 20. so now im 3 days late. may i add im NEVER late. 26 days between AF visit every month... bb's have kinda tender.. but that happens before AF shows swimming feeling in my tummy and feels like im goin pee every 15 mins.so baby hopes was super high this month. taken 3 HPTS and all have been BFN!!! well then this am there was very light pink blood on the TP. i have also been checkin me cervix and its still very high. so now hopes are droping. i dont think its EVER goin to happen.. anyone else got this goin on? thanks for letting me vent