My wrists are weak!?

No way! your bones will not break unless you are weakened with Osteoporosis....most people (women) get after 50. You might have arthritis....which is just simple inflamation of the joint space. I have had it since I was 18! Your wrist has bones called metacarpals...they can test for whatever but there is no cure...you can take motrin to help the inflammation. Also, calcium for bones since you are worried.