It's unlikely vaccine will help you at this point, although there've been some anecdotal reports of vaccination reducing symptoms of long covid.
Has the definition been consolidated now that covid is (seemingly) a little less political?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875269/ https://www.thelancet.com/journals/eclinm/article/PIIS2589-5...