PIP GP Assessment

Hi just wanted some more advice regarding my pip claim. I had my assessment via telephone on the 2nd November. I received a text on the 3rd to say DWP have received my report from the assessment services. However I was on my online account for my Doctors surgery and could see they received a pip form for information on the 4th November. Is this normal for a GP report to be requested by the DWP after my assessment? I am getting really worried now as I thought it would be the assessment services that would request this? I rang the DWP PIP helpline for an update and was told my report was with the case manager. I really don't understand why the GP report would not be requested before the report was sent to the case manager.