I had a mastectomy a year past in April. I can’t remember the correct name but the cancer fed on eostrogen. It was the second time I had breast cancer, the first was a lumpectomy about 10 years ago.,

I have been ok since the mastectomy but now all of a sudden I am having hot flushes. If that was all I’d put up with it but it’s the horrible feeling before the flushing. I feel really ill and feel I’m going to pass out or have a panic attack. Then the flushing is really strong but I get relief when it’s over. 

is this normal?