Help understanding CM TMI


Okay so I’m new at the TTC thing. Never paid any attention before this month to my cm consistency. I’m CD 12 and so far it’s track exactly like the books say it should. Dry then sticky then creamy. I checked earlier it was creamy and according to the app I’m not supposed to ovulate until the 9th. Just went to go pee and wiped and got a shock. Large amount of no doubt about egg white cm. I get the app isn’t always right and I’d need to test to be sure but my test strips aren’t in yet. The amazon fairy is excepted to come tomorrow with the of course. But My bigger question is should your cm change that suddenly? cuz I swear an hour ago it was creamy!