Question: White growth in my mouth?

Hello! Last night I was at a festival and tried a lot of food (including crickets!) and at the night, my throat started feeling funny. It felt a bit weird as I attempted to swallow. I woke up with the same feeling so I opened ny mouth and checked in the mirror and saw it! There was a white-ish thing on my throat! Should I be worried? What is it? What causes it and how do I get rid of it?

white thing in my throat