So i try nano vapor for the first time on monday and im doing dumbbell bench, while struggling to get the last rep up i may have held my breath but when my spotter helped me to the top and i dropped the bells i got an instant severe head ach..3 advils to help it..i couldent finish the work out..i took tuesday off and today i went back taking the nano vapor once again..i begin my work out and twords the last sets of incline db bench the headach begins to return so i stopped short and went home...now i dont know what to blaim the nano vapor or mondays poor technique that may have fucked up something in my head..either way im thinking of taking the rest of the week off.. if anyone has any imputs please feel free..