It's possible to still produce eggs at 49 or 50, but those eggs are 50 years old, since you are born with all the eggs you will ever have. That is why the birth-defect rate goes up as you get older, if you are lucky enough to get pregnant, and the likelihood of pregnancy goes down. If you were doing IVF with donor eggs, I'd say go for it, but if you are financially strapped it would be nearly impossible because it can cost up to $20,000 or more.
You should visit your doctor.