Im 26, my mother born w/ severe bilateral hip dysplasia corrected by surgery. lifelong hip "catching" and clicking in joint, and pain. poss dysplasia?

Possibly: A simple hip x ray will give you the answer.

Now arthritis: Dysplasia correction involves cutting the femur and/or pelvis, and the changing the alignment to improve coverage of the ball by the socket. Dysplasia comes in various types and degrees of severity. Because the correction is rarely 'perfect', some symptoms can be present. Most patients develop degenerative changes later in life. (arthritis).