K.C.
At this point, you're worrying about worrying. It's a viscious cycle and it's only made worse by the fact that you're pregnant and probably have heard all kinds of horror stories, etc. Relax, take a deep breath or many (if you can still, the space gets limited in there after awhile), drink some water. I had a similiar situation that inclded some braxton hicks contractions at 20 weeks and it's scary. But you need to remember that you're in control of how you feel and you CAN calm yourself down. Seperate yourself from whatever is causing the stress long enough to relax and then come back to it only if you really have to.