I had some weird sensations for a few weeks near my index metacarpal, like a dull nerve ache. It eventually subsided after a few weeks, but keep an eye on it. If there was some minor nerve damage it could just take a while to repair, or if the implant is pressing against the nerve it may also just take some adjusting and time to heal/settle.
I would just monitor the symptoms but if they persist for several months or become worse you may need to take action.