Not feeling well

Monday when going to fetch my wife’s car from the garage I had what I thought was a really bad allergy attack, but since then my nose has been very stuffed up.
The covid tests keep coming back negative. I don’t have a temperature. All the other various instruments I have for measuring things say they’re fine. (Blood pressure, blood sugar, blood oxygen…)
But, I am very stuffed up.
Hopefully it won’t last too long and my wife won’t catch it.