@Lostnfound -- Yeah. There's just no reason not to be up to date on your immunizations in the US. You can get them at the county health department even if you don't have a family doctor.
I wouldn't want measles during pregnancy, for sure. You have enough going on with your body without having to deal with measles, which are notoriously painful and difficult to deal with. And again, with the limited number of medications available to pregnant women for fever relief, measles and pregnancy must be a miserable experience.