When you said you were in "northeastern, I thought you were in New England
There are several forum members in the midwest @clarkinks orobably knows more about pears than most of us.
I personalky would not spray fungicide when you don't know what you spray for. Keep in mind, many pear leave issues are caused by tiny insects that are so small that a magnifying glass is needed to see them. Spraying fungicide for them would be a waste of time and energy.
Also, if the issues are caused by those insects, spraying now could be OK or even too late. Timing of spraying is very important. Read up on those signs and symptoms of pear issues that published by Cornell, Penn State Extension service is a good start. Good luck.