Hi snow4dayz,
Yes that's normal and the pinky is the weakest finger so it does take time to strengthen it. The steel string acoustic is a little hard on the fingers especially if you're beginning but I wish I had a Martin too! don't give up on it, the finger toughness will come in time and you've got a great guitar, you were smart to invest wisely, you're playing will sound better and become a better player faster with a quality guitar like that.
You could, if you wanted, try a lower gauge sting set (thinner) for a little bit till your fingers toughen up. But, I think 'hang in there and keep playing' is the best advice.

Neal