Tell me HOW/WHY?!

So I have HG aka symptoms from hell. Non stop nausea and puking. Even when not eating I’m throwing up stomach acid. I’ve been trying to eat healthy aka oatmeal, fruits, yogurts, all the good stuff. Every. single. time, I puke immediately after! So today after my 4th puking episode of the day, my hubby ask if I want anything from McDonald’s. With the nausea being horrible, I originally said no, but changed my mind just because I’m desperate to keep anything down. TELL ME HOW/ WHY that Big Mac and fry literally cured me and I feel like 100 bucks. Lol . I was told greasy foods made nausea worse but for me this made me feel brand new. Anyone else had this experience ?! Obviously not planning to keep this an everyday thing but omg it worked !!