Confused?

anna330

I'm 37 years old and this is my 3rd pregnancy. With both of my other pregnacies I was on bedrest from about 20 weeks until delivery (full term and healthy!). The bed rest and several hospital stays.... cause by my incompitent cervix. 

Now with this pregnacy, my cervix is staying around 3cm, but also changes frequently (my Dr. says it's because of my dynamic cervix).

He is now not requiring bedrest and says that things look fine. I just want to know how this pregnancy can be so so different from the others?! He keeps telling me that everything is fine and each baby is different. I'm just really nervous. How can this be?! I would hate to go about my daily routine and have something bad happen.....help? What should I do?