Why did Glow do this?

I had a glob of discharge on the 20th of August it was like jelly and stretchy. I have never had this

I Googled it and many people said it's egg white cm just sometimes it can come out in a glob.

So I marked the 20th on Glow as EWCM

But then it changed my expected period from September 8th to Expecting it September 2nd?? Which means it's supposed to come tommorrow. I just noticed that.

Also tonight I have experienced pinching in my lower abdomen to my pelvic region and sometimes on my left side and gas.

Do those symptoms seem like pregnancy or Period? I don't have any cramping which is a good sign for me considering I have vaginal cramping 3 days before usually.