Septoplasty Caused Ulcer on my Palate - Is That Normal?

Inmediately when I woke up from the septoplasty surgery I noticed I had an ulcer in my palate that I didnt have before. Have trouble eating and its uncomfortable. After 3 weeks it hasnt reduced the inflammation in its size, its actually growing, i'm starting to get sores in my palate too and my gums hurt. I went back to the Otolaryngologist that operated me, he prescribed "Deflazacort" but I dont feel comfortable taking it cause its an immunosuppressant. What can I take to elimininate the ulcer?