1/12 0715: Received Pfizer covid-19 vaccine dose 2 at end of shift. Went home to sleep after waiting 15 min.  1630: Woke up. Felt more tired than usual.  1900: Arrived at work. Felt fatigue and sore arm.  2000: Felt sore arm, fatigue, and mild HA. Drank coffee and this helped with fatigue and HA. 2100: Mild nausea starts. Still have sore arm. Less fatigue, no HA. Still able to eat with the nausea. 2200: Developed chills. I was putting up curtains in an isolation room and had to pause halfway through due to being short of breath as if I'd done something strenuous. I then was short of breath again walking specimens to lab, which is unusual for me. Walking samples to lab involves walking 400 ft and going up and down 1 flight of stairs.  2300: Coworkers keep asking me why I'm always out of breath. They are concerned. Chills are worse now and I go from feeling normal to feeling cold. My hands are like ice and I am gripping my arms to keep warm. I walk 2 samples to lab and each time I am dizzy on the way back. By the 2nd time I have to hold the wall to keep balance. I can no longer hide the side effects and a coworker offers me 650mg Tylenol. I gladly accept. I measure my spO2 and it is 97%.  1/13 0530: I am almost back to normal other than feeling fatigued.  0815: I get home and go to bed. My feet are ice cold so I have to wear socks, but my hands feel normal temperature. I feel like my blanket isn't warm enough.  1330: I wake up and feel absolutely miserable. I am going between having chills to having a hot flash. I can't seem to will myself to leave bed. I'm pretty sure I have a fever, which I haven't had in over 10 years. My mouth is completely dry.  1400: I manage to roll out of bed and take my temperature, which is 101.3F. I feel an overall malaise and keep getting periodic hot flashes, but manage to make it downstairs and I mix 1 liquid IV electrolyte packet w/ 24fl oz. water. I drank the whole thing. I also cooked myself some dumplings and 1 waffle w/ maple syrup due to feeling much hungrier than usual.  1430: I take 1000mg Extra Strength Tylenol after eating.  1830: I feel almost normal except for significant fatigue and go to bed.  1/14 0430: I wake up and feel completely normal. No fatigue. Go about my day as normal. 1545: Suddenly I feel lightheadedness and mild HA. Have trouble with inattention (ex. not following w/ conversation or forgetting what people just said, or listening but not registering, or can't find the words to respond or answers to a question.). I take my Vitals: 117/95, spO2 85%, HR 63. I then try taking a couple deep breaths and spO2 increases to 98% and lightheadedness and HA go away. Then a few minutes later lightheadedness and HA begin again and spO2 is 80-90%. Then I take 2 deep breaths and spO2 is 98% and HA and dizziness improves. This repeats several times and I grow concerned. My hands are cold and the pulse oximeter is $30 from Amazon. However, I used the pulse ox on my mother and she was 97% consistently every time without fail. I also used pulse ox on myself when perfectly healthy and same thing it was 98%+ every time. This is why I was now worried. 1630: I take Tylenol since this seems to have helped with any and every symptom I've had so far and book an Urgent Care appointment.  1700: I get up to take a shower and feel extremely dizzy to the point where I'm worried I might fall. I stumble into the bathroom holding the wall. I take spO2 and it is 87%.  1800: I show up to Urgent Care and after the shower I feel my hands are warm now. At Urgent Care they are using  pulse oximeters and I am spO2 99% and HR 64. So they chalk it up to my crappy Amazon pulse ox and they tell me to hang in there. Perhaps if I had not taken a shower before going there it may have been a different story? Hard to say now. Also the Tylenol may have started to work by then.  2200: I am still inattentive, spacey, lightheaded, and fatigued. I then fell asleep on the couch without realizing.  1/15 0230: I wake up and feel fatigued with brain fog, but no more lightheadedness.  0630: I go back to bed because I'm too sleepy.