Oh boy, that seems really like a difficult grocery day! Pushing through chores while still suffering from a cough must have been taxing. I also well understand the difficulty of trying not to cough in public; it seems like the longer you keep it in, the worse it is! At least you weren't alone; many others appear to be now suffering with the flu as well. With some rest and a nice meal from your shopping run, maybe you will completely recuperate before your birthday. Sending you good vibes and I hope you feel better the soonest!