Aspartame causing nausea

Patient: I’ve never been diagnosed with PKU however my body has adverse affects to aspartame. I just need one sip from a diet/zero beverage and I’ll get close to throwing up. I found that even if I chew gum with aspartame in it I get a sour stomach after chewing about 5 pieces. I have mild anxiety that I have been told to treat it when needed with hydroxyzine. I also take Junel Fe 1/20.I was just wondering if there’s a reason I have such bad reactions to aspartame, especially since I don’t have PKU.

Symptoms: Nausea, Headaches