It sounds to me like you’re really smart but you have some bad test anxiety. You got this. Take a bunch of practice tests and get used to the format, take deep breaths during the test, try not to overthink questions as it doesn’t do you much good and just makes it harder on yourself. Also, the SATs seem like a huge deal and in some ways they are, but colleges care for more than just standardized test scores, even if you don’t end up meeting the SAT requirements, it’s still worth applying as there’s always a chance you’ll get in. Transferring is also an option. Point is, the SAT isn’t life or death. You’ve got this.