My fears are:

1) Reaching 12wks and not knowing i have lost the baby again.
2) Reaching each milestone - you think it gets easier but it doesn't
3) Ultrasounds and appt's - I stress so much i get ill from it all.
4) Not having any pregnancy symptoms.
5) Then not getting the baby out in time as i get pre-eclampsia towards the end of my pregnancies.

My list can go on a bit longer. I think talking to others that have been through it also helps but you still get days where what ever anyone says you still only believe how you are feeling at the time.