"The tank is a 95 gallon setup for the hatching of the egg case."
If this tank is just a hatch/growout tank then you should be fine for a while until it reaches problematic length and girth (over 12" depending on the tank dimensions) and at 4 months old you should be ok for now. Yes, eventually you will need a larger display and primarily due to dimension restrictions of "standard" tanks. Be aware small gobies, blennies, and other benthic fish might be eventual snacks
As far as injury, if the shark's behavior has returned to a more normal state then you may want to leave things be (limit stress) unless you just want to take extra precaution. Depending on the size of the shark, probably around 8" or so?, you might be fine in a 40g breeder (75g would be best) for precautionary treatment. Don't be surprised if the shark doesn't eat as most animals will not take in food if injured. I would worry if the animal has not eaten in a week and you can tell by the stomach mass underneath and from the sides.