terrible fears during pregnancy

Ka
Little background. In June of 2016 at 21 weeks my water broke and I had to give birth to our sleeping baby boy. 
I am now 15+5 and as the weeks get closer to that time where I lost our son I am having terrible anxiety and fear. Nervous about getting an infection. Starting to be scared of sex. Scared to go to my next appointment. I don't know how to change it. 
Has anyone gone through something similar and had success stories ? I really next some words of encouragement right now