U can get symptoms like that from GH but I have never heard of anyone getting it from 3iu a day thats still a low dose. Did you ever have any problems b4 the GH?

Carpel Tunnel should only effect your thumb , index, middle finger and half of your 4th digit. Your pinky should be spared. With that said, I still beleive that it is possible with only 2ius's to get symptoms of CTS. Is your hand really swollen or just feel like it is?