6 weeks and 5 days today. Help!

So I am 6 weeks and 5 days today and I have been having morning sickness occasionally. This morning I woke up and tried to eat breakfast but I just couldn’t eat..so I ate some pretzels cause they normally make me feel better. But what’s weird is I’m very cold and shaking like shivers. Is this normal? Just a few weeks ago I woke up drenched in sweat cause i was so hot? Anybody else experiencing this?