Feeling fever and chills constantly!! Could this be a sign of early pregnancy??

Zheyan • I`ve been married for a year and trying to get pregnant. Never used birth control pills hoping to be pregnant soon!
It's been a week I have these so called hot flashes and all the sudden I am hot then super cold where I need a blanket! I don't have a cold or any symptoms of it! Could this be a sign of early pregnancy symptoms??