No symptoms should I worry

I am almost 4 weeks along and have absolutely no symptoms. My first appt (just appt- no ultrasound) isn't until I'm almost 9 weeks. I have no cramping or nausea or breast tenderness or sensitivity to smells, nothing!!  Has anyone else experienced this? I almost wish I was feeling these things so I'd know something is happening. 
The only reason I found out was because we were trying so I was testing. Got faint positive at 9dpo, the kind got slightly darker two days later. And got positive on CBD. If I had a miscarriage would I know it?