PIP form now received

I'm really struggling to fill this form in, im getting panicky and really upset. My mind has gone blank and I can't concentrate or get motivated. I'm worried I won't get it filled in in the 2 weeks I have left. Can I ask them for an extension (even though I don't have a 'proper' reason, other than that i'm having difficulty filling it in, it's not as if im waiting for evidence or anything)?

Just back from my GP. My usual GP is on holiday and won't be back until after I have to send in the form. I saw another GP who knows me and my condition, and is 'sympathetic' towards mental health issues. But he said he wouldn't fill in the B&W form because he didn't think it would help my case, as he says PIP is nothing like DLA with regards to mental health, it's not fair and it's very unlikely I will get anything unless I have a carer going everywhere with me (which I don't). Does that mean most people don't get it if they have mental illness? He has left the form for my other GP's discretion when she comes back but he feels she won't fill it in either, and the practice don't write support letters. He did say, however, that he knows I am a special case and that the practice will do all they can to help me IF the DWP get in touch. I also have an appointment with a benefits advisor next week. Do you happen to know if benefits advisors attend assessments?

I feel Q11a and Q11b both apply to me, but I presume that if I got points for both only one of the scores would be counted, as opposed to being added together??