Sickness has gone?

I'm 8 weeks and 4 days pregnant with my 3rd. My eldest is 9 yrs and youngest is nearly 10 months. With both of them I was quite sicky- especially my second one! I'm quite a sicky person so for this to happen is quite unusual. 
I'm not experiencing any cramps at all or bleeding but the sickness seems to have calmed down a lot. I'm worried of a missed miscarriage. No history of any miscarriages either. Has anyone else had this? Feeling quite worried :(