The act of "jamming" a digit ro joint often results in the stretching or tearing of supporting ligaments. The elbow, like the knee, have ligaments and other tissue surrounding the joint to add stability. You've jammed the joint and probably impinged on a nerve, causing pain on pressing action. Recovery may take more than a few weeks (as long as a month), and while pulling doesn't appear to affect it, it may not be helping the healing of damaged tissue either.
You could have chipped the bone where connective tissue attaches, so if the pain persists much longer, it may be best to see your physian for exam and an x-ray.
One item here... It seems a bit odd to me that pulling with resistance *through* the joint isn't bothering you. A jam or chip affecting nerves generally leaves the entire joint aching and inflammed. Either motion, push or pull, would be expected to produce some pain from flexon.
