I broke my finger two months ago and the nail just came back to full length. i do still have a "chubby" finger is that swelling or fluid of some sort?

Nail growth: Can be delayed by trauma and ift he nail bed or the distal phalanx was involved it can take a few more months before the final appearance is reached. In the beginning there still is swelling and it doesn't take much to make the end of the finger feel and look different at times it's temporary and others its a cosmetic change it depends upon the injury. Again it can be 3-4 months for a change.

Swelling: Swelling is very common in finger injuries and can last much longer than the symptoms of the injury itself. The swelling can take months to go away. Nails normally take quite some time to normalize after an injury. Nail growth slows after injury and can look unusual when it immediately grows back. Your nail could take a full year to look like the other nails.

Maybe: It could be residual swelling or deformity from the fracture. An x-ray can differentiate between the two.