Well, inhaling anything chemical is not doing you or the baby any good. How about some friendly mousse?
As far as the pressure, I would just mention it to your OB next visit. Every "body" is built differently and people are sensitive in different ways.
I am 35+ weeks and thought that my baby had three heads (or at least two and a large hiney) and even worse....wasn't turned correctly.
Then my doctor checked and assured me that his head is down (
not one of the lumps?) and that one lumps was his back, one was his butt and one was his feet.
Apparently the kid has feet like a flippin' HOBBIT! ha! Have you had your ultrasound yet?