Did you ever get a pH reading like Balkey suggested?
The droop of upper leaves is a sign of 3 problems, and you could have one or all of them:
-Too much Nitrogen in the soil
-Roots do not have enough space
-Insufficient circualtion of fresh air

Your small, stunted leaves and very soft new growth are not good signs. What is your ventilation like? Try to get a soil pH runoff number. And what are you using to water the plant- include water source and anything you have added to the plant's water in the last 3 weeks.