Green - I don't know much about PH fixes, but found this to help you out...
As for the repotting, I hope she was unhappy enough in her clay to forgive the disturbance of being molested at this late stage. Maybe she will surprise us and start growing like mad in relief and thanks for the fresh soil. Hope you used something with a little peat/perlite in it to help drainage.
(PASTED FROM A SICK PLANT GUIDE)
Here are some ph buffers when your ph is too high: Use these SOIL PH Adjustments to lower your ph: sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and peat moss. Sawdust, composted leaves, woodchips and, lemon juice, PH Down (vinegar and lemon juices are good for soil, but not recommended for hydro use).
Here are some that will raise the ph: use these SOIL Adjustments when your ph is too low: PH UP, dolomite lime, hardwood ash, bone meal, crushed marble, or crushed oyster shells, potassium hydroxide <--- Thank you Uncle Ben!