I was prescribed medrol(methoprednisolone) for a week, and I've lost my appetite completely...?

Is this normal? It was prescribed because my Eustachian tubes were full of fluid, and it has a chart of how many to take every day, with 6 the first day then one less pill every day. But I'm on day 4 today, and I still can't eat anything. Yesterday I made myself a grilled cheese, smelled it and had to throw it away- the same with anything I eat even sweets or foods I normally love. I'm already losing weight, and I'm only 125 pounds. I've had problems with anorexia before and this is starting to scare me. What should I do?