So much clear... discharge?

Brie

I am 4 days into my period with a medium flow. When I used the restroom I noticed that there was a lot of this clear discharge? I’m not really sure if that is the technical term. But it was clear and seemed to have the consistency of the whites of an egg. I have had clear discharge before my period but never during and never this much... Does anyone have a clue what it may be? 😕