What is normal?

Ever since my miscarriage on the 4th I've been trying to move on and try again. The problem is no one knows when you really should start trying again, and no one knows it wont happen again... I'm so scared to get pregnant and just go back through the same trauma. I just want everything to go back to how it used to be before my miscarriage... I just want a beautiful healthy baby... and I've been having some pregnancy symptoms and I'm trying to stay calm and not assume I am and if I am I dont want to go through anything like this ever again. Sorry I just had to rant...