Stressing

I am wondering if I could have some advice from anyone. I experienced a miscarriage in August 2016 at 18 weeks due to PCOS and now that my husband and I are getting closer to trying again and I am so stressed out about every little thing concerning getting pregnant and staying pregnant with PCOS. I have to watch every little thing I consume, drink, exercise, take supplements etc I have a notebook full of all things to stay away from and what I need to do to have a healthy pregnancy...yet I am still freaking out. I have prayed initially for a baby, then prayed for God’s Will over our lives whether that means we will have children or not....I know the big thing is to pray and let go....but I can not seem to grasp that concept. I am absolutely terrified of miscarrying again. Has anyone experienced this? If so how did you manage? If you have not experienced it I am willing to accept any and all advice.