how to get over fear

hey! I don't have anyone to ask about this cause no one knows but I have a very deep rooted fear to vomit (emetophobia) and it's affecting my life cause I physically can't eat anywhere but at home without feeling nauseous, and scared of others being sick/getting food poisoning.

btw I always had this fear (the vomit itself) it started from my brother when I was 4 when he vomited all over me in the car. But it became a real problem when 2 years ago I had a food poisoning incident from an engagement party and since then I physically can't eat in restaurants/places without pure fear of having food poisoning.

the only thing I can slightly handle is cafe food (coffee, bagels) but I have to eat while walking? it's really weird. Plus im in uni and I really don't want this fear to continue cause its driving me insane, plus im horrified to drinking, eating out in bars/clubs etc (I haven't even done it but still)

It's actually affecting my life cause I never go out now, just Uni, home and driving lessons. Please anything can help! (plus I dont know if this a phobia or just a fear so..)