You take very little risk by waiting to see if there is reduction of swelling and ultimately a result that is acceptable. Adding a filler may not achieve the result you are looking for and leave you will even more chin volume that may take more time to disappear than acceptable. Steroid injections may result in fat atrophy also producing an unsatisfactory result. With examining you or knowing the details of the previous implant failures, your safest bet is to do nothing for a while.