Glow moved my dates around today

Di • 32 - first baby due June 14, 2015
I can't seem to load a photo but I'll try my best. I'm on CD 19 and Have been uploading my BBT since CD10. Glow predicted that my fertile window would have been this past Friday up until today, with AF prediction for October 9.
​This morning I took my BBT and uploaded it. It was .08 higher than yesterday. Glow suddenly changed my windows by 2 days -  fertile window now ended yesterday, AF predicted for October 7. 
​Has this happened to anyone else? And should I be worried about missing my window? Last BD was Thursday, couldn't this weekend because we had an out of town visitor, then BD again Monday and yesterday.. Not sure if this means I missed out on this month.
​I know bbt will continue to guide me, wanted to check in with the community first.