Chris,
Thanks for the post. Your experience sounds exactly like what happened to me. I wasn't as deep, but as you stated I am a new diver and my body is just getting used to it. I was at about 40' when it happened, ascended slowly into warmer water and I was fine for the rest of the day. Our second dive was around the 30' mark so I was in the warmer water most of the dive, with no problems. I am anxious to get back and do it again, not the vertigo, but the quarry. I live a few streets away from west hill and would love to dive it, if you are in the area and in need of a buddy (all be it an inexperienced one) I would love to tag along. I have been on top of that water for a long time now and would love to see the bottom.
Ken