I Had My Right Thyroid Removed 3 Days Ago And

I had my right thyroid removed 3 days ago and i am having feelings of hot flashes that when going on I feel like I get disoriented and it's hard to catch a breath. On the way yesterday to have the drain removed I experienced this and on the way home afterwards. it seemed to help when I ate. Well, today its not the case. I get this feeling of heat rushes then I start feeling like I'm rushing is the only way I can explain this. They told me I was sweating really bad when I came out of surgery and it was passed off as normal. It's not. What can this be? The feeling gets so bad It terrifies me.