My tax return might have gotten lost in the mail, what should I do? I don’t know if IRS received my return I mailed it on 3/2/2020 and the refund tracker says it cannot be found. I can’t c

Since the IRS phone lines are closed I can’t call, and there doesn’t seem to be any other way to verify if it was received or not. It’s been at least 5 weeks now. Should I keep waiting