Wa'alaikumassalam sayang, I totally understand why you're worried Sayangnya, this is something you MUST see your doctor or go to clinic/hospital TODAY or tomorrow morning, jangan tunggu, because sudden disappearance of pregnancy symptoms at 6 weeks needs proper check-up, even though sometimes it can happen normally. The breast pain going away is one thing, but combined dengan the nausea stopping suddenly, your doctor really needs to do a scan or blood test to make sure everything's okay with baby. Jangan risau sorang-sorang ya, a few of my mum friends went through scares like this too, and having a doctor confirm either way will give you peace of mind. Boleh minta husband or someone to come with you, okay? Praying for you, please go get checked ASAP.