Anyone else having trouble with their calendar?

Meghan

I got off my period and according to my ORIGINAL calendar, I was to start ovulating last Saturday. Usually after I log symptoms & my ovulation tests it will change a bit. It has changed so many times now that I don't even know what's going on. It's changed before I even have a chance to log anything. My peak day was supposed to be Wednesday & it's changed twice then then & now is saying it's today when my ovulation strips are saying otherwise (even though I'm logging them) I don't understand what's happening.