On 03/25/2021 at around 11:15am, I received my first Pfizer COVID-19 vaccine at the medical center. The vaccine came from lot number ER2613. The rest of the day I had zero symptoms as well as no soreness in my arm from the shot. On 3/26/2021 I woke up and felt completely fine and well rested. At around 9:30am I was at a flower nursery when I began to feel extremely nauseous, anxious, and started having lightheaded/dizzy spells. I proceeded to drive home, an approximately 7 minute drive, where I immediately began to have violent vomiting and diarrhea. While this was occurring I began having muscle cramps with extreme fatigue and shaking. After 20 minutes of this my girlfriend helped me into bed. Once in bed we realized I also had a fever of 103°F. While in bed I had a cold washcloth on my forehead to try and bring down my fever. I had cold sweats and chills while in bed. For the next two hours I would periodically go back and forth from the bed to the toilet with both vomiting and diarrhea. I finally fell asleep and woke up at 7:00pm. I no longer felt nauseous, I had a temperature of 99.2°F, I felt very cold, and felt extremely fatigued. Knowing I needed fluids and nutrition, I had some chicken noodle soup with water and Pedialyte. After eating the soup, my stomach felt fine so I ate some more with bread. We went to bed around 10:00pm. I had zero nausea, no fever, but still felt very weak and exhausted. I woke up at approximately 2:30am with a diarrhea accident in bed. I immediately ran to the bathroom where I continued having diarrhea, dry heaving, stomach cramping, and shaking while my girlfriend started the laundry and put on new bedding. After 30-40 minutes being at the toilet I went back to bed where I had a fever of 101.6°F. I placed a cold washcloth on my forehead and eventually fell asleep. I did also recognize a rise in my heart rate when I would go to bed. For the next two days I laid in bed trying to rest while periodically trying to eat and drink fluids. However, I continued to vomit and have diarrhea throughout both days with fatigue and body aches. I also began to recognize a rise in my heartrate when I laid in bed. I began to feel my heart beating from my chest and in my temples. By 3/29/2021 I no longer had periodic fevers, regular nausea, or body aches but I did begin to recognize food sensitivities. For the next 10 days, I did not have a single solid stool and slowly identified foods that made me nauseous. I found my 100% Premium Grass-fed whey protein? shakes were causing nausea within 5 minutes of drinking. Before the vaccine, I never had any stomach issues drinking these protein shakes. I used this brand and this specific protein powder for 2 years on a regular daily basis. I also identified spicy foods were now causing cramping, bloating, and nausea. Which before the vaccine, I also never had a stomach related issue with at all and had a high tolerance for spicy foods. I finally found myself becoming nauseated after eating yogurt. Before the vaccine, every morning I would make parfaits with 100% grass-fed Greek yogurt, organic granola, and organic blackberries. By 4/8/2021, after recognizing foods sensitivities and adjusting my diet, I finally began to have solid stools. I have received a significant amount of vaccines due to my time in the military. This was the first time in my entire life I had ever experienced an any type of adverse reaction to a vaccine. *As a note: I also received adverse effects to my second dose of the Pfizer COVID-19 vaccine*