I had this too. Keep an eye on it after bubs is born. I never got it diagnosed but i suspect it was carpal tunnel. After DD was born it went a bit then came back very badly - it was a symptom of my underactive thyroid. If it's still there when bubs is a few months old or if it's hurting so bad you have trouble doing things (i couldn't open my blinds because it was too painful to grip the cord) then see the doc about it.

Bec