Symptoms subsided.. normal??

I am about 6 weeks along currently and my symptoms seems to have subsided for the most part. I have been nauseous, had cramping, and have been extremely tired the last could of weeks. But recently i have been feeling better and haven't had any nausea or cramping. No bleeding or other signs of MC. Did anyone else's symptoms come and go? Is it normal? I'm trying not to stress (I know stress is bad for everyone involved) but I'm just looking for a little reassurance that everything is still ok! Thanks in advance!!! :)