Food Allergies Treatment

About 6 months ago I ate some of that bad peanut butter and got very sick. I thought I got over it completely, but now whenever I try to enjoy roasted peanuts or a snack sized snickers candy, I find myself getting dizzy and vomitting as well as rashing.

Could this be a newly developed minor allergy?

I’m done with peanuts forever now, even though I love them. If it is not an allergy, it must just be flashbacks from that food sickness.