I write nonstop and people are always like oh this is so good! But when I re-read it the next day all I can think is what was I thinking? This is trash! Is that normal?

Very normal I tend to do that. Probably write on Microsoft word so your writing looks good and not trash

It's perfectly normal. We're always our own worst critics, and sadly our friends and family are our best supporters. If want to know what your writing is really like show it to an unbiased third party. Someone that doesn't care about you and will judge your writing based on your writing skills.

I can always find something wrong with a story I wrote, even after correcting it every day for a week.

That's what makes us good writers. :D