So confused. Help!!

Laura • Wife & Mother of two❤
So last week Glow said my fertile week was last week. Hubby was gone for AT. I just got a still smiley face on my ovulation test and when I logged it it says today I have a 33% chance of getting pregnant. My fertile week changed after I logged it, why is that? And do I have a chance? Hubby leaves again for training in August. For two weeks. And my periods are irregular so I'm hoping this Will be it! 
Please explain as why it changed after I logged it and also if I have a chance!