Am I being discriminated against?

I enrolled in a medical billing/coding course at a local technical school early this year. I have a small but visible tattoo on my neck, and was never informed prior to starting classes that I would have to cover it up. Due to a medical condition, I am unable to place a band aid on my neck. After being told I would have to cover it somehow, I requested leniency with their policy until my financial aid disbursement check came, which would enable me to purchase blouses/collared shirts to cover up my neck. The school has refused to accommodate, even when I explain to them that I have a medical condition. I explained that I am a single mother and could not afford to purchase any clothing to cover my neck until I received my financial aid, and since I knew nothing of this policy until classes had started, I was unable to make arrangements or possibly choose to get an education elsewhere. Also due to my medical condition, I keep my hair tied back in an effort to keep it off my neck, and during my enrollment, it was quite open and obvious that I had this tattoo yet no one explained the schools policy to me. I filed a formal complaint in writing with the Dean, ad they are still refusing to accommodate for my medical condition. Is this discrimination?