This biggest adverse affect is about 3 hours after injection my right arm started aching (I got injection on left arm). I was pumping my hand and bending my elbow and such trying to make it feel better. Then boom, all the pain went away, and then suddenly it felt like I pulled a muscle in my neck even though I wasnt doing anything . I tried rubbing it, and it didnt go away. The next morning I woke up and couldnt turn my head or nod. My left leg was spasming; like the spasm youd get right before a charlie horse which is usually a sign of dehydration or not enough potassium; except I had drank a gallon of water the previous day and had eaten a banana before bed. The neck pain was so bad I was almost in tears, it was hard to get out of bed. On day 3 I could start to move my head again, but it was still not fully and still causing me alot of discomfort. So 46 hours after vaccine I had a professional neck massage, as well as floating in a float tank for 30 minutes. Float tanks are filled with epsom salt which help muscle soreness. My muscles didnt feel sore, they were just spasming and cramping and being painful. I also had a brief leg massage and hot towel wrap, and sat in a massage chair for an hour. This all really helped. Except on the 4th day, hour 62ish, i woke up with neck pain again feeling like the entire area i got massaged was inflammed/hurting, and both legs spasming, and then the left leg cramped up/got a charlie horse. I have never in my life gotten a charlie horse unless i was dehydrated, and i have continued drinking 3/4 to a gallon of water a day, as well as increase vitamins (went from taking multi vitamin, to also taking magnesium, tumeric, vitamin e, ibroprofen, potassium, vitamin c), and nothing is taking away the constant spasms.   Starting at about 2 hours after vaccine I was just laying in bed and started profusely sweating. I took a cold shower and felt better. At 3 hours after vaccine I was out and about, i wasnt moving too much/barely doing anything at all, and all the sudden i started profusely sweating, and it felt like I had stepped into a hot sauna temp wise (I was in an air conditioned room). I took ibuprofen. It is now 74 hours vaccine and the only time I notice sweating profusely is if Im doing minor tasks like cleaning up house, but otherwise dont feel like i have a fever.. no amount of water, or ibuprofen makes the sweats go away.   I had a headache day 2 after about 18 hours after vaccine, took ibuprofen, went away immedietly. Then on day 3 after about 40 hours after vaccine, I got another headache that lingered all day long and wouldnt fully go away no matter how much ibuprofen I took. I do not typically get headaches, maybe only once a month, if that.   I have noticed random bits of nausea, like It will be lunch time, ill make lunch, sit down, have two bites, and feel nauseous from eating. Other times I'll feel nauseous when Im hungry, but then eat and it goes away after a bite of two. This is just different, its not bad or really all that bothersome. Just there. I do not typically have stomach issues or aches/nausea.  Leading up to getting vaccine I took multi vitamin everyday for about two weeks, started drinking more water, etc, to help symptoms be less, just in case I got any, I wanted my body to be in optimal health.   I also have a sore arm at injection site, and a big red welt around it that 2"x1" in size.   Important note: I had covid in March 2020. All that happened to me was I lost my taste and smell, had a runny nose for a couple days beforehand, and then soft drinks tasted completely off/not sweet or good for about a year and 3 months, and had runny noses everyday for same amount of time. I no longer have those affects, but didnt need to be seen by a doctor, was not severe at all. My pharmacist said typically people who had covid before get adverse affects on the first shot, but not the second.