Mine looked like a blister and there were times I could see some white underneath the skin. Maybe yours is a simple case that will respond well to antibiotics and you won't need surgery.
I know it is a let down after feeling better and more in control of this to have a new symptom but you are finding it quickly and it may not be anything complicated.
Are you going to get insurance through your works COBRRA program? If you are in school a lot of schools offer some kind of health insurance program though I know you are more concerned with missing school. I bet this will all be sorted out quicker than you think.