Barb,
That's a tough question to answer without seeing you on the bike! My GUESS would be that its a fit problem but hopefully, one that can be fixed easily. You might just need to have your saddle moved a bit farther back. You might need a longer stem. You are doing the smart thing and going in to a bike shop to get fit. If it is a good shop, there are no stupid questions you can ask them. Tell them just what you posted about how your hand position feels. Then when they put you on the bike and have you ride it they'll know to be watching specially for that problem. Good luck!
annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard