You might consider a high deductible plan with a Health Savings Account (HSA). It will have low premiums, but as the name suggests, a very high deductible. I don't get insurance through my employer and the premiums on my last individual policy went up too much for me to continue to afford it so I switched to the high deductible plan. With the lower premium, I can stick money in my HSA on a regular basis and even when I add that, it is still less than my previous premiums. It's probably only worth looking into if you are in good health because you will pay out of pocket until you reach the deductible for the year so if you have regular treatments or prescriptions, it will be very expensive. In addition, only do it if you have the discipline to regularly make deposits into your HSA. Maybe not an ideal solution, but better than no insurance and maybe better than what your school offers depending on your health.
I find health insurance really difficult to navigate, but I went through an insurance broker and she really helped me (I had all kinds of problems getting my info released from my doctor's office to the insurance company, god knows why, but it took a couple months and my broker kept on top of it for me). You might see if friends or family can recommend a good broker to you.