How serious are you about wanting new representation?

A new attorney or non attorney rep can always reschedule the hearing if they need more time.

If you parted ways with your attorney prior to your hearing, and showed up by yourself, the ALJ would give you the option to reschedule to find a new attorney or non attorney rep.

If your current Alleged Onset Date is within six months of your 55th birthday, you have a high probability of being approved via the Grid Rules, IMO. Have you figured out if this applies yet?