My mother has pseudohypoparathryiodism. What are my odds of having this same disease?

Depends... .... As there are many types of pseudohypoparathyroidism. In some types (such as in albright's heriditary osteodystrophy) that risk is as high as 50%.
This is moot. There are several forms of pseudohypoparathyroidism, variably inherited in various forms depending on the affected parent. It should be clear already whether you have the bony abnormalities. Some simple labs will tell whether you have the renal calcium loss, blood calcium and parathormone level abnormalities. Good luck.