Pfizer-BioNTech COVID-19 Vaccine.  1-2 minutes after receiving vaccine, I experienced light-headedness, dizziness, and a heavy feeling in my head. I relayed my symptoms to the RN who administered the vaccine and told her I did not feel well enough or safe enough to walk down the hall to the observation room. She got me water, orange juice, and a breakfast bar. I finished the breakfast bar and drank part of the water and orange juice. She told me to stay seated with her for as long as I felt necessary. 15 minutes later, the same RN told me I was ashen pale. She advised me to lie on the floor, which I did with my feet up on a chair. 15-30 minutes later, I told her I felt well enough to walk. She told me to do so and I sat with the person who came with me to receive the vaccine as well. We talked for about 15 minutes when I told her I felt numbness, tingling, and a burning sensation in my throat and the back of my tongue. She got an MD who walked me to another room to quickly examine me. I told her my symptoms and started to experience mild nausea that lasted about 5 minutes. She hooked me up to a machine which revealed 99% O2 sat and heart rate 72. She gave me Pepcid PO. I waited another 30 minutes and told her I felt well enough to leave. As I was driving home, I called the MD who examined me after vaccine administration and reported redness and sores at the back of my throat and back of tongue. I also reported the same burning, tingling, and burning sensation in the back of my throat and back of tongue. She advised me to go to the employee health clinic and be seen by an MD. I arrived at the clinic 15 minutes later. Vital signs were taken with blood pressure in the 140?s systolic, an O2 sat of 100%, and heart rate of 76. The MD who examined me stated this was probably some type of allergic reaction to the vaccine. He gave me a steroid shot IM, Benadryl 25 mg PO and had me stay 90 minutes to be observed after administration. I felt well enough to go home. He told me to take Pepcid PO BID and Benadryl 25 mg q 4-6 hours for the next 1-2 days. He also wrote a prescription for a Medrol Dose Pack to be taken in 2 days if symptoms did not abate. He advised me to go immediately to the ER if I had difficulty breathing where epinephrine could be given. I stated agreement and went home. At home I continued to have sores, redness, tingling, and a burning sensation in my throat and on my tongue as well my head feeling heavy. I also felt muscle soreness and a burning sensation in from my feet to my knees in my legs bilateral. I took the Benadryl and Pepcid as directed and went to bed.  The 2nd day, I still felt the odd burning sensation in my throat and on my tongue as well as the presence of sores in the same area. I also had a heavy feeling in my head, felt woozy intermittently, and had a burning sensation with itchiness on my chin. I picked up the Medrol Dose Pack to have on hand in case I needed. I continued to take the Benadryl and Pepcid as directed by the MD. The 3rd day, the numbness, burning sensation on my tongue and throat is gone but the burning, itching sensation on my chin persists. Sores are still present on the back of my tongue and the back of my throat along with redness. I still have an intermittent feeling of heaviness in my head. I continue to take Pepcid but have stopped taking Benadryl. I have decided not to take the Medrol Dose Pack. I have decided to let the symptoms run their course and call a doctor if any symptoms change in severity or go to the ER if I experience a medical emergency.