My joints are cracking!

I've had weak joints since birth and lack of exercise makes them crackle and pop. I'm on my feet all day at work, and I sit all day on my days off. I tried to cut my nails while sitting cross-legged, and my knee joints were so painful!!!! Just how weak are my joints, you ask? I dislocated both my shoulders when I was 5. In middle school, I nearly dislocated both my hip joints when I squatted down in a Japanese-style toilet. My finger and ankle joints are always hurting and popping. When I try to stretch, the moment I do, it goes CRACK CRACK CRACK CRACK CRACK CRACK!!!!