Hi there!
I was told my cervix was prematurely opening up at 26 weeks or so..I was told it was 1/3 open or some thing and advised as much rest as possible..
At my 30 w scan the situation was the same so they told me t continue with only limited activity..
at 32 weeks, i was told i needn't worry about anything as they could handle any problem if it arose..
I finally delivered by emergency c section at 39 weeks(they induced me as my amniotic fluid level was pretty low) but ironically, my cervix wouldn't dilate after 3 hours and my lil one's heartbeat started falling, so they wheeled me in..
I hope this helps..
Just to tell you that its impossible not to worry, but it also doesnt mean that you are going to deliver prematurely..
Just avoid squatting and bending frontwards until you're 32 weeks and oh, until 32w,no nooky!
cheers,
smita