Cycle longer than 90 days

Anndria
I'm new here and wondering if there is anyway to change the setting to make my cycles longer than 90 days? My last period was sadly in November but this is telling me I had one in February, which I haven't, and that my next is on Monday, which I'm almost positive it's not. Not sure what's going on with me or my cycles and why they are so screwed up...but it sucks. Does anybody else have super long cycles? Suggestions? I have a dr apt in a coupe weeks. Thanks in advance! :)