Help!

Melissa
My pregnancy has been labeled high risk due to my weight. For a little background information I'll tell you I am currently 34 weeks pregnant and I've undergone many tests to see how my weight has affected my pregnancy. Thus far, by the grace of God it has had no negative effects. All tests came back normal and baby girl is healthy and happy. I just received word that she is in the 68th percentile for weight, so that's good. This is however where my worry comes in. My Dr's have just ordered weekly NSTs for me with no other explanation than increased bmi, I asked for a reason I could understand seeing as my weight has had no negative effects so I just couldn't understand. They gave me nothing and I was forced to do the worse thing I could, I googled it. The I found out that a person of my bmi had increased risk of still birth and sudden, inutero infant death. I'm am now terrified! My Dr said to call if she stops moving out moves less than usual but that has only made me paranoid. How do I know how much less movement is cause for concern? Don't babies just have days where they are less active? I know better safe than sorry but how can I make sure I'm not in the hospital every other day because I'm convinced my pregnancy is doomed? I'm sure the stress I'm giving myself isn't going to help anything. My budget says I'll know if something is wrong, to trust my instincts, but how do I know? This is my first pregnancy, what if my instincts fail me and I lose her? Please tell me there is someone else who has gone through this and how I can get through it too! I'm desperate!