In this case, it probably sounds like there is more than one thing going on.
The tingling in the fingers, especially the pinky finger which goes up to the elbow and arm can be related to "pinching" of a nerve, either in the neck area, or the elbow area. Considering you don't have neck pain, it may be more likely in the elbow area, though having a herniated disc in the neck can often cause pain/numbness in the arms without significant neck pain.
The following is a description of ulnar neuropathy, compression of the nerve at the elbow:http://neurosurgeon.com/conditions/ulnar_neuropathy.htm
As for the chest pain, your doctors have ruled out a heart cause, which is good, so one has to wonder about chest wall pains, or nerve pains as well. Hopefully the doctors have ruled out inflammation of the heart lining, "pericarditis", which is classic for chest pain while leaning forward. As for the pain in the leg, those could also be coming from nerve issues or inflammatory issues.
Essentially, you still need more evaluation to figure this out, because further bloodwork to rule out inflammatory causes for joint pains (arthritis and infections and similar conditions) and neurologic testing to determine the reasons for your arm symptoms would be helpful.