re pip assessment

hi all i recieved a letter from capita today with an appointment for my assessment on the 28th feb 2 weeks today ...however i live in corby and they want me to travel to leicester for a 10.30 am appointment time however i dont drive , i dont know many people with a car , i dont travel well at all what with travel sickness and my conditions , if i rang them would they consider a closer location ? i doubt i,d get a home visit i no i need to go to the appointment ... i,m already scared about the whole thing i have fibro , ocd,ibs,oab,depression,anxiety,panic attacks ,borderline peronality disorder, skin issues eye issues and few other things .dunno how i,m gonna get there and cope i,m trying to get pip as my dla ends in april this year but that took me 3 goes to get dla .my issues have got worse over the last year etc where i dont /cant leave my flat for 2 weeks at a time or i,m stuck in bed because i,m suffering with really extreme fatigue ,and /or i,m in so much pain i can not even walk down my stairs to the front door , i,m worried sick i wont be entitled to pip, and because my conditions are nothing u can see there all hidden on the inside i,m scared ...any advice ?