Since the judgment has been entered recently, presumably in Justice Court, you might timely appeal it to Superior Court. It does not sound as though an appeal would be successful, however. Your bankruptcy filing in March would not have included your liability for the subsequent judgment, and so the judgment is viable and can be collected against any non-exempt assets you have. It is very likely, with what you have stated, that your wages could be garnished. Unfortunately, your mother may have some liability under the lease, but I doubt that she was included in the eviction action which rendered the money judgment. If she was not included as a party to the eviction (Forcible Entry and Detainer), she would not be liable for the judgment you refer to. The landlord could possibly bring a separate action against her for breach of contract.
You may have other strategic options which might be explored in a fuller discussion of all the facts. You might consider contacting the landlord to propose a discounted payoff or terms for payment on the judgment, without revealing anything specific about your financial resources. You do not want to give a judgment creditor any information which can be used by him to collect.