How to cure anxiety induced vomiting in public

[Heruga]

I used to have pretty bad emetophobia 11 years ago when I was in middle school after this one incident but that gradually went away. I actually never threw up in public back then, it was just simply an intense fear. But this time I'm actually throwing up in public. It all started this year in January after this incident where I threw up while at a restaurant. I was meeting my girlfriend's cousin for breakfast and I guess I was nervous slightly because I haven't seen her for a long time. As soon as I started eating I started feeling nauseous and went straight to the bathroom and threw up there. 3 days later, on my first day of my first ever new full-time job I threw up again. It was during an orientation and while the lady was speaking the dizziness came to me from too much nervousness so I ran to the bathroom, barely making it because I was so dizzy and everything in front of me was so blurry. I literally couldn't see what was in front of me. I somehow dragged my body to the toilet and then threw up there. Although nothing came out. The third time happened in August when my mom came back from Chicago to visit us and we were all out for dinner at a buffet. She also invited her best friend and her family members whom I've never met any of them except her friend and husband. As soon as I started eating I started feeling severely anxious again and started feeling nauseous. It got worse and worse so I stood up and decided to run to the bathroom before its too late. But it was too late. I was so dizzy and lightheaded as I was walking and everything was so blurry. Then I just collapsed right in front of the bathroom door. I fainted for like 5 seconds from too much dizziness. Then I somehow got up before anyone passed by and walked to the toilet where I could barely stand. I had to lean on the toilet full of piss..thats how dizzy I was. And I threw up there a couple times.

Situations like this make me extremely nervous to go out in public without a bathroom nearby. I get scared that this might happen out of the blue again. I carry a plastic bag with me everywhere I go. I really need to fix this anxiety. My girlfriend and I are planning to get married in 2 years and I really can't be like this in front of her. I started taking karate lessons to keep myself busy and active more. But if anyone knows a good strategy for this or knows how to permanently cure this type of anxiety could you please let me know. I'm pretty desperate. Thanks