Cant change brush

I literally created a new file like a couple days ago, I could change the brush without it being a pixel brush and all of that. Fast forward today, I am unable to use the regular brush/hard round. It stays on the pixel brush so my drawings are pixelated which is really annoying. I’m already having this other bug where I can’t open one of my files because it’s an “Invalid psd file” which is so dumb because I was just working on it a week before and now I have this new permanent pixel brush which I can switch out of. If the next update doesn’t fix both these problems I might just have to drop fresco.