The cal-hypo is probably what raised your hardness. With it that high, I wouldn't use any more cal-hypo, because of the milky water problms it can cause. The tabs will eventually add CYA, but it's going to take a long time--you might want to consider adding CYA (stabilizer) separately so that your chlorine will be better protected from the sun. (WalMart sells it in the spa section--check the ingredient label--you're looking for cyanuric or isocyanuric acid).

A pH of 7.2 is okay for now, just make sure the trichlor doesn't drive it down. You're not using a lot of it, though, so I don't think it'll be a problem for you. If this were my pool, I would pick up a few gallons of plain, unscented ultra bleach while you're at WalMart and use that for shocking, rather than the Cal-hypo. Your plan to keep the TC high for now is good.

What is your TA? Sometimes, if the milkiness is due to calcium, bringing the TA down a bit will help, if it's high....

Janet