I'm allergic to peanuts.. & I was craving peanut butter, I ate some & nothing happened I didn't have a reaction or anything.. you can out grow the allergy. I'm still a little scared to eat a lot of it because of the allergy.. but if it doesn't bother you when you eat it then you should be fine or call your doctor & talk about it to him/her.
You may have some immunity while being pregnant. I've never been allergic to anything and now I'm allergic to rabbits, and have to use only mild soap and lotions like baby products because my skin breaks out. Pregnancy does some crazy stuff but I'd still steer clear of peanuts.