Symptoms that come and go?!

Krissy
Does anyone else have issues with their symptoms coming and going? Some days I get nauseated over a lot and some days it doesn't bother me at all... Some days I have cravings and some days I have no aversions or cravings... 
I had a m/c prior to this pregnancy and now I freak out anytime weird things happen lol... 
Is this normal?!