5 weeks, no symptoms

I had a miscarriage in March, I'm now 5 weeks 1 day, although have no symptoms. During my first pregnancy I noticed my breasts were sore and swollen before I had a positive test. I had my hcg checked at 4wks 3days and 4 wks 5days and the levels nearly tripled, although we're still fairly low (below 300). My progesterone was at 34. I don't have another appointment until next week and I'm freaking out a little. Has anyone had a successful pregnancy without having symptoms in the beginning?