Paranoid/anxious/worried

Ok ladies I need some help here. This is my first pregnancy and I am so worried something will happen. I want to enjoy this time and be positive but there's always those what ifs and maybes. I have crohns which my high risk ob says has no factor on the quality of my pregnancy but I am just a worry wort! I am a little over 4wks and worry that every time a new symptom appears it's something bad. Please help! Tell me to relax! Something.