PHOBIA OF THROWING UP

So ever since a really bad experience when I was a kid I’ve been terrified of throw up my whole life. Even little stomach aches can kick up my anxiety by 100. I ate like 3 quarters of a cheese burger today that tasted kinda funny I guess but I ate most of it anyway. Got home maybe 3-4 hours later and pooped twice but still felt nauseous and ended up throwing up twice so far and I have stomach cramping going on as well. Is there any difference between the stomach flu and food poisoning? How long does food poisoning usually last?!? What can I do to help myself feel better?