I’m allergic, but since taking a nasal spray with a steroid in it, and I don’t have any problems at all now.
You probably wrote your post to get ‘approval’ from others to leave so that it made you feel a little easier, but personally I’d try going to a pharmacy, or preferably see a doctor so you can get something stronger. You only need to last a week, so the quicker you get a doctors prescription the quicker you’ll feel better.