Wow. Have you ever tried to diagnose yourself online and made a hangnail into leukemia? I think I just did something like that with my avocado tree. I planted it about two or three weeks ago and for some reason lately a lot of leaves have been falling off and I don't know why or if it's ok or if I should do something differently. So I started searching to see if I could figure it out and it looks like a lot of people have had a similar experience and the issue seems to be everything from over watering to some kind of tree disease. I'm just not going to water it for a week and see how that goes...