I got the vaccine at 9 a.m. and I started feeling very tired at some point in the afternoon. I was feeling a little bit odd and mostly just tired. We sit down to dinner at 6:30 or 7 and I started getting these weird 8 sort of radiating down my legs almost like achy knee pain. I had the urge to have a bowel movement, which appeared to be a normal bowel movement. I started feeling progressively worse. I was just achy, fatigue, and it was just kind of hard to do things and move around. I breastfed my daughter. I guess I should mention that with both of the vaccinations, this being my think it, my breasts got very engorged and painful. I am 7 months postpartum and never have engorgement or pain in my breasts. But for two days after the vaccine I had engorged painful let down both times. I was feeding her and just ceiling off. I got up hoping I would have the energy to put some groceries away and then I wanted to take a bath because I thought it would make me feel better. I walk to the kitchen and my knees and legs just felt so weird and achy. My entire body started shaking and trembling uncontrollably. I really couldn't move very well and all of my muscles were tensing up. So I just went down to the floor and tried to stay in a fetal position. While this was happening I was getting really cold. At some point my teeth started chattering and my muscles were tensing up, especially the muscles in my neck and jaw and shoulders. They hurt so bad and felt like they were just tightening beyond control. My arms and hands felt very very cold. My lower back especially along my spine was hurting really badly and my knees and other joints were hurting. I stayed on the ground until my husband, who was putting our daughter to bed, came out and helped me get to the bathtub. He actually thought we should call 911, but I wanted to try hot water to see if I could get my muscles to unclench. I sat in hot bath and the shaking stopped but I started feeling like my head was boiling. My husband helped me get out of the tub and dressed and pretty much right when I got out of the tub I started feeling really cold again and the shaking started again. I got in bed under lots of layers and was still very cold and shaking. My head felt very hot but the rest of me felt very cold. I had a lot of trouble sleeping and kept alternating between feeling like I was on fire and then my body would be really cold but my head would be really hot. I just felt really achy and feverish. At one point I felt pretty dizzy. So I just held still as much as I could. At another point I got what felt like really severe period cramps on my left side. I changed positions and they did go away. I felt nauseated the next morning and have no appetite. I made myself eat some saltine crackers and have a coconut water. I felt still like I had a flu or something but the headache was the worst part. I have never had a headache that bad it felt like my entire skull was cracking open. And pretty much the first half of the day after the vaccine I felt like I had just been hit by a truck. I ended up taking ibuprofen midday because of the headache and the joint pain that I was experiencing mostly in my knees and started feeling significantly better. It has been 2 days after the vaccine and I pretty much feel normal except my lower back feels swollen on the left side. The night when all of this was happening my lower back was hurting pretty badly as well along with my other joints, specifically my knees.