What does this mean?

So I was supposed to start my period a few days ago (says the app, though sometimes I know its a few days off for me personally) but two days ago I think I was pmsing yet never started and today I have a ton of extremely white discharge or cum or whatever its called and usually I will have a little bit, and I've never had an infection but I don't feel itching or burning, just sooooo much of this stuff coming out of me lol its not completely liquid or sticky its more of a creamy and not uncomfortable just like I'm probably gonna have to change underwear lol, its thicker feeling. I've just personally never had so much, plus missing my period? Any explanation y'all can think of? Like what the discharge means I guess lol