Problem with Glow on most fertile day!!

Milhu • 31yrs, DH 39... We have 2 girls, and working on our rainbow 🌈 baby.. Currently pregnant and praying this is it!!!
Yes! I had a problem just now! It said my peak was on Thursday  and now when I checked it, it changed and said Wednesday! I hand BD on Tuesday then my DH had to go out of town to work, and I was going to go and see him on Thursday, on my most fertile day! What happens! Why did it change!?? I don't know why it changed! Did I just miss my peak day!!??