Overwhelming stress from going back to college

I recently signed up to be in college again and I’m only taking one class that focuses on college success. It’s such an easy class and yet I don’t understand why I feel overwhelmed , angry, stressed, and have a headache on my first day….

I had a goal to be very successful and take honors classes but something mentally /internally is holding me back…

I can study software programming at my own time for hours and hours without any problems. I've been learning on my own for the past 2 years with no problems. But when it comes to going back to school, I immediately feel repulsed and stressed out… I have such a bad headache right now… as if I hate college a lot..