Female garter snakes get to sexual maturity around two years old. They have an average two and half month gestation period.
What you're describing could be any number of things, so it's impossible to say without seeing a photo. You might want to check out the Garter Snake forums at Repticzone.com, as they allow photo posting.
What you're describing could be any number of things, so it's impossible to say without seeing a photo. You might want to check out the Garter Snake forums at Repticzone.com, as they allow photo posting.