Hi, I have had anxieties like yours before but I want to assure you that that the possibility
of your having had a
stroke, or that the biopsy caused some kind
of obstruction in the brain, or clotting, is minimal. Really unlikely! Yes, one should avoid things like aspirin before surgery but seriously, if you took one or two it won't hurt you.
It is also not unreasonable that you would have a headache after an anxiety provoking procedure like the one you had.