Gullian Barrè during pregnancy

Katie
Hey all!
I just discovered I was 5 weeks pregnant. I'm so excited! But I think my nervousness is taking control. 
When I was 16 I had Gullian Barrè and it changed my life. The doctor told me that my immune system will never be as strong as what it was before that happened. I'm now 25 and so much better. I do still have symptoms if I'm too stressed, tired, or sick. But now that I am pregnant, I'm trying to stay positive about everything. 
I'm so worried about a miscarriage or having problems during pregnancy. I need some advice!
Should I worry? Are there any precautions I can take? Anyone go through this?