Donna
Did you raise the issue at your hearing. It's not required but would give more strength to your case if you had.
Whether to apply for the Set Aside is a decision that only you can make, if successful it could be 3 or 4 months before you get a another hearing and you would still have to deal with the issue of scoring enough points for an award.
Have yo spoken to your advisor about this.
You can make a new claim for PIP immediately if you wish.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems