Can someone please advise me very upset here

So I am going through college exams at the moment and I’m worried I will fail.

I took Ella One (PLan B) on the 24th of November. I was due my period that week. I am on the pill Yaz and I have been taking it religiously. On the 27th of November I got a bleed. It was bright red and there was little clots but I did notice that it didn’t last as long as it normally does and I normally get heavier period.

anyway now I’m mid-way through my cycle. Currently on day 15 of 28 and the last few days I have had such sore boobs, headaches, little bit of nausea, creamy white discharge that’s sticky and stretchy. Have felt very wet down there. I’ve also had really weird twinges.

This is a picture of my discharge yesterday. (sorry tmi)

Today my discharge is clearing up but I’m worried cause my discharge was more white than clear....

I have taken two pregnancy tests and they were negative, probably is too early to take a test...

I woke up this morning with a cold..

Please advise I would really appreciate it! I can’t sleep or anything and can’t stop worrying

Could it be ovulation?