Worried

Toria
I'm 11W 2D and have been suffering from severe symptoms - nausea, bloating, fatigue, headaches etc. 
Yesterday all my symptoms disappeared and now I'm just feeling a little nauseous. 
I'm worried that something is wrong. Such a sudden change doesn't feel right to me. We had a scan at 6W and everything was fine, strong heart beat. 
Has this happened to anyone else??? I have a scan next Saturday (6 day wait 😞)