need help determining weather or not to file charges

Auto Shop:  You would need to present a claim to the body shop along with evidence that your brakes were negligently repaired and that the negligence caused your accident.  You would need a written report from a mechanic documenting the defective repair.  The auto shop would likely ignore your claim and you would then have to file a lawsuit.  The amount you are seeking would determine whether you would file in small claims court, municipal court, or common pleas court.  You could retain counsel, but I anticipate that you would likely have to pay an hourly rate with a retainer fee. Hospital:  Under Ohio law, an unauthorized touch of your person by a medical provider is civil battery.  Your could pursue a claim against the hospital.  The issue is whether the cost to pursue the claim exceeds the value of the claim.  IMO, from the description you have provided, unless there is a whole more that happened, the is not a large value to your claim.  I recommend that you contact your local bar association and ask for the lawyer referral department and request the contact information for local attorneys who may be able to assist you.