Can I really be pregnant?

A little background. I was 9wks 3 days at the end of November when I found out I the baby had stopped growing at 8wks. After not miscarrying naturally I had a DandC on 12/6. I only bled a week and my symptoms all went away pretty quickly. I thought I had my period 5 days ago just some light bleeding thought is was because of the procedure. I have been feeling off the past few days so I took a test and it's positive, I am about 5 weeks removed from my procedure. I am hestitant to get excited because I did all the research on the internet that said you could have leftover hcg in your system. I have not called the doctor yet. I am just curious how quickly everyone else bounced back and if this is even possible.