I'm totally confused here - I tried to LARP in high school and sucked at it, but there was *never* anything that would make it labeled "contact sport" or a "sport" in general, so I guess maybe it was a different game?!
That being said, is there a local one you can play while pregnant that *wouldn't* involve the contact portion?
There are different types of LARPing. Sounds like the OP participates (participated? it's a 5 year old thread) in a type called Boffer larping, which is a high physical/low story variant that involves large combats with armor and foam padded PVC weapons.
I'm not super familiar with LARPing (I'm a pen and paper girl), but I wouldn't recommend a contact LARP while pregnant, even if you have a special agreement that you'd be exempt from the combat part. I wouldn't necessarily trust that someone wouldn't get over exuberant in the "heat of battle."
Re: LARPing while pregnant?
DS1 - 7/2011, DD 12/2012, DS2 - 4/2014, MMC - 12/2015