Unfortunately, I had shingles first. I got caught in a vaccine age transition - when I turned 50, the vaccine in place was recommended at age 60 (hence not prescribed or covered for 50 year old). I guess within a couple of years, Shingrex came & was recommended/allowed for age 50, but I didn't get the memo & fell through the cracks. So at age 55, during chemo treatments & worn down, I got shingles. As soon as able after that, I got the Shingrex vaccine because I'll tell you I DON'T WANT SHINGLES AGAIN! I won't lie and say it's a fun shot, found it a little worse than the flu vaccine. But I still got the recommended 2nd dose because the shot didn't compare to actually getting shingles. I would make sure that what you're experiencing isn't different than what's on the information/problems listed on the side effect instructions you hopefully got though, as we all react differently to vaccines. Best wished for tolerance!

Similar experience as well. Had the shot at 6 pm Friday and Saturday morning felt pretty bad with chills and aches but went for regular 25 mile mountain bike ride anyway thinking I might shake it off. Felt fortunate not to have crashed. Hot bath after. Flu like symptoms continued Saturday and took two advil at 10:30pm and 5 mil of melatonin. Slept with some mild sweets. Woke Sunday feeeling considerably better.