White watery discharge + 8 days late?

Bb

I’m 17 and I’ve been having white watery discharge for the past few days now, like I wake up and think it’s my period. It’s watery mixed with some creamy discharge? Just a bit...I’ve never had this before and according to glow and all my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a> I’m 8 days late on my period. I had protected sex on July 16th so I can’t be pregnant, and I tested on August 2nd and it was negative.

I usually have my periods every first of the month but in July it started on the 27th and it was brown and not red, light and I was spotting brown stuff/blood for two weeks before it finally stopped.

Has anyone else had this?? This is new to me and I’m super worried. Thanks y’all!!