Good Day , I Found Out That I Was Allergic

Good day , I found out that I was allergic to pork about 6 months ago. I drink 2 glasses of red wine every evening, all of a sudden I get dizzy, nauseous, and my husband says , my face goes all white, looks like the blood leaves my face. then I must go and lie down, don't feel well. last night , I had 2 glasses of red wine, I could feel the same symptoms again, I then had a big glass of coke, I felt better afterwards, but still had a headache. is there something wrong with my blood suger? I donate blood, and my iron is always good and my blood pressure is slightly low, but that is normal. it is always been like that. I also cant eat fatty foods, then I get nauseous as well.