I don't have much swelling at all, but it seems especially when I sleep I have carpal tunnel. Thankfully I've always been able to adjust to whatever is uncomfortable and ignore it after a little while. For me started at about 28 weeks and carpal tunnel has gotten worse (am now 32 weeks) but I'm just more aware of how I have my hands or what I'm doing. When I wake up at night to go potty (once or twice) my hands ache specally my fingers but I just shake them loose and after a few minutes they are fine.
I know they were bad Thursday thru Saturday last week due to the fact we were having a rummage sale and it just HAD to be one of the hottest few days. Seemed to have aggravated my carpal tunnel but now that I rested and it has cooled down, it's all 'good'.