When i had a similar reaction after my first Pfizer shot thE end of January, I called pfizer to ask whether I should get the second one, fearing the sx might get even worse. They told me at that time they had had NO reports of neurological side effects. I had read people online saying they had had such effects but apparently no one was reporting them. Probably, in part, because their docs were like yours, thinking it’s a coincidence. Maybe it is but how will they ever discover a relationship if no one reports these problems to the companies? I never got this reaction after the flu or shingles vaccines.