Ok, first, just take a deep breath.... we are here and we all want to help you. You can order the R0870 DPD powder from TFtest kits at
http://www.tftestkits.net. Take a look to see if you need any other chemicals at the same time, to save on shipping costs.
As for the CYA going up.... what is this "shock powder" you are using? Dichlor adds CYA, Cal-hypo does not. Please read the entire label and tell us what you are using.
I am confused by the drops to ppm values you are giving, it may be that I do not use that test kit. Someone else will have to jump in here for that part.
When you saw the bottom of the pool, was it clear of debris? If there is stuff down there you need to scoop it out with a leaf rake.
It takes and amazing amount of chlorine to turn leaves and sticks to liquid.