Symptoms vanished


Hi guys, need some advice reassurance as driving myself crazy!

I am 7.5 weeks pregnant, from weeks 4-7 I was suffering from cramping, bloating, food aversions, weren't sleeping, I had two days where I felt really nauseous then poof, 3 days ago all my symptoms seemed to vanish!! It was nice not to feel awful over Xmas but now I am freaking out! Is it normal for symptoms to come and go?? I had a scan at 6 weeks and there was a heartbeat, I just feel completely unpregnant at the minute!!! Advice? Experiences please?