Pregnancy after menopause?

I was on Depo for two years after a miscarriage. I stopped it two years ago and haven't had a period since. Since I'm 40 I figured I was going through menopause (I only had one ovary, so could be going through it early). Dr seemed to agree though no testing to prove it one way or the other and I'm not on hormones, haven't needed them. Thought I had the stomach flu, but now wondering if it's even possible to be pregnant since I haven't had a period in two years?