Both answers are correct above. It really could go either way. You should take a test..
After your MC, did you get follow up care to make sure your HCG levels returned to less than 5?
Have u had period since your m/c? sometimes it can take 6-8 weeks to even get your first period after m/c.
It's possible. Women are very fertile after a miscarriage. I would take a test and call the doctor from there. Good luck.