Please Help Me Keep My House

Dear People. I have had a skin infection on my legs for 3 months.  I've been in and out of the hospital and the doctors still don't know what's wrong with me. My son lost his job when the infection started and hasn't been able to find a job because he's been helping me at home. This skin condition is both itchy and painful.  We are asking for $500 by March 31 for our property taxes and if we don't make the payment, we go into delinquency.  We've sold everything of value at this point and I'm now reaching out to the kindness of strangers.  Can anyone help me please?