AF and Glow. Help?

Glow says today is supposed to be the end of my period.... But the thing is I haven't gotten it... I'm currently on CD 52 and my last cycle was only 44 days and that was the latest it's ever been... 
​So, my BBs Arnt sore, no vomiting.  
​Blue veins in BBs, yes 
​Light cramping, yes 
​Pee Freq, yes
​Took hpt yesterday night and BFN
​Could I be preg? Why neg tests if I'm already late? My
​Cycles been crazy since I got off Bc pills but never this long!