I recently noticed my betta had been acting erratic (I.e banging against things, not really eating) and just the other day I saw this white spot that had formed on his belly. Not sure if it’s ich or something else. Any help would be appreciated!

I know I am asking a super ton of questions but I am nevious. My betta(Of 4 days) seems super tired today. He usually swims around(espically when I watch him). He also got spooked, the first time I had seen him swim soo fast. I touched my finger to the glass he usually comes closer but he darted...