i'm not pg - so my situation is a little different to yours - but i have chronis problems with my wrists so hope this info helps

i've found that gently massaging my wrists at the point where your two arms bones meet close to your hand (sorry, not a great decription!) helps immensely - i have that clicking you mentioned regulalry in my left wrist - if i massage that point with my opposite thumb on both the inside and outside of my wrist (have to apply a bit of pressure) it will loosen up the carpel tunnel fibres - i've been to specialists and masseuse - and they both suggested same - it's basically a case of massaging enough to break up the tighter fibres around there - it's usually a good idea to do it for a while then move your hand around a heap just to keep it loose - also heat packs for a little while will help

i know that was a bit of a ramble - but hope it helps! good luck