Failing college engineering at top 3 program?

In high school I got mostly A's. I studied really hard. I didn't take many physics/math though. I only took up to ap calc AB and didnt' take ap physics and I got into a top engineering program at a school that rivals MIT. Now I'm failing. I study my off but I still fail. I'm getting worst in the cl. My physics midterm, which i studied so hard for I got a 25%. SHould I stilll study engineering and transfer to a lower school? It was physics 7A. I failed and I feel so bad right now I want to cry so hard. What should I do? Even if I do well on the final/next midterm, I'm stuck with a C at most, most likely I'll fail. Should I retake it over the summer, switch majors ,or switch college or both switch major and switch college? i'm in industrial engineering. I 'm taking calc 2, physics for scienctists and engineers, matlab programming, and english right now. I'm failing every cl. What should I seriously do? fml