What type of lawyer should I contact for being illegally dropped from cosmetology school?

I am a student attending beauty school in Machusetts. I had the flu for two weeks in December and made up my work with better than adequate grades. The administrators (a week after the fact) announced to the entire night cl that a student would be dropped due to attendance. I did have a doctor's note but I could not make up the time I had missed. Throughout the time you are enrolled for you are given an allowance of missed "hours". I don't believe I went beyond what I could afford. Regardless, I was dropped due to the average between my grades and attendance for the modular I was sick. They claimed there was a new policy where if you fail a modular you are dropped. The policy should take place when we are informed and I should not be penalized for what happened two weeks ago! Later they told me the policy had always been there but they never enforced it. I later found out that your attendance and graded work should not be averaged together to determine if you p a modular. I spoke to someone and he seemed to be trying to help but I haven't heard from him in months. I have started cl again though 100% attendance is necessary even if ill or I will not be allowed to return. I'm considering a lawyer in seeking the justice the school won't provide. Any information as to whether I even have a case would be appreciated.