@Pumpkinma it could be carpal tunnel, I've had the same thing appear over the last week and a bit or so, hands swell (goes down), pins and needles in my fingers and generally stiff feeling in my hands, I did mention it to my midwife as I know swelling can be a sign of pre-eclampsia, but this is usually accompanied by headaches, feet swelling and some other symptoms.
Deffo call your midwife if your worried though, better to be safe than sorry!