It is very hard for an attorney to withdraw from a bankruptcy case because of the sensitive nature of bankruptcies. Therefore if you want to fire your attorney or change attorneys, you may have to push for it yourself. Ask for a hearing. Don't wait for the next hearing. But first talk to a competent bankruptcy attorney so they can determine whether they will be able to take over on your case.
Yes, you can switch your attorney. It is your right, as the client, to select who you want to represent you. Just make sure the new attorney you have is more prudent with handling their work load.
Even though I am biased, I recommend looking for a younger attorney. Most younger attorneys are faster at doing bankruptcies because they know how to use the bankrutpcy computer technologies themselves to manage their caseload. A lot of older attorneys tend to not have the ability to use this new technology, which is a major disadvantage.