What Causes Constant Tail Bone Pain Along With Pain In Leg?

As a minor I ve had constant tailbone pain and very severe leg pain. My mom never really believed me told Mr I was exaggerating. But it was unbearable. Now as an adult I still have constant.leg pain but the persistant lower back pain and swelling of my hands and feet are a big concern for me. I can honestly say.for years I have not gone a day without having the severe back or leg pain if not both. I ve never had surgerys or major accidents. I am not even 24 I am noe a mom of 3. But.like I ve said the pain has been there since a minor and I honestly can t remember a full day from 8 yrs old were I ve had a full day without some type if pain whether it be leg back or even ankles.honestly all my joints in general.