The indent caused due to removal of fibroma should heal with time.For the pain,you can take some anti inflammatory pain killers like Diclofenac.If the scar or indent remains,then laser resurfacing can be used for this purpose.
I hope it helps. Take care and pls do keep me posted on how you are doing or in case you have any additional doubts. Kind regards.
I will give the pain killers a go. Getting rid of the pain is my main priority, so if this works, i will be in your debt.
Best wishes and get well soon.