The past few months I have been waking up with a migraine along with hot and cold sweats. It’s so bad I have to call out of work sick when this happens. I sleep all day then by the evening I feel much better. At first I thought it may be the flu or a bug but it only happens a few times a month. And I know when it comes on because my migraine is so unbearable. Could this be a blood disease that I’am unaware of?