Women helpful advise on chills and then getting hot?

Ok so I am 26 and my period is due in two days. Just a couple of days ago I have been experiencing getting hot all of a sudden and stripping off my clothes not totally just leaving my pants and t-shirt on. Then a couple minutes later I am clammy and cold. Then I am waking up with my being all sweaty. Is this cause my period is coming that my hormones are doing this? Is this normal?