Fear even though in third trimester

Laura
*trigger* (fear of third trimester loss discussed) 
So...I'm 30 weeks with my rainbow baby and find myself really getting nervous.  I know it's rare, but I hear the stories of women losing their babies in the third trimester and it terrifies me (to anyone who has had a loss such as this, I apologize if I've stirred up unhappy memories).
I was found to have low Papp-a and hcg at first trimester screening. Baby was found to be normal and healthy so so far we have just been having extra ultrasounds to monitor growth and placenta function (as my low levels can indicate placental abnormalities).  As of my last ultrasound, two weeks ago, she is doing great..but I still can't help worrying.  It doesn't help that I haven't figured out a pattern of movement for her yet.  Anytime I think I'm figuring out a pattern, it changes...and depending on her position, I either feel little movements in my pelvis (when she is I believe breech and turned in toward my spine) or huge movements everywhere.  It's so nerve wracking when she goes back to the little taps in my pelvis instead of big movements.
So....Anyone else worried again even though in the third trimester?7