Re: Gross pregnancy sweating. ew.
We keep our house around 72/73 normally. During pregnancy I had it at like 66 and was taking bundles of ice and rubbing it all over my body, or jumping in the shower and spraying myself with cold several times a day. I think your body temperature just goes totally nuts. You may have to bite the bullet and seriously lower the AC for the last couple weeks.
The other thing that helps is to dip your feet into really cold water. That will cool your whole body very quickly. I used to throw ice and water in a bucket and then sit with my feet in that for a minute or two. Dipping your wrists in will help cool you too.