Hi L Bowen
You have been misinformed. No one receives DLA and PIP. If you wanted to apply for PIP now, you would need to tell the DWP that you want to put in for a change of circumstances because your health has deteriorated - in which case they would tell you to apply for PIP. Otherwise, you can continue on your DLA until such time the DWP tells you they are going to migrate you across.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems