Medical

Hi i have received a letter from pip telling me to travel to Birmingham for a medical and i live in Coventry, the thing is that i told them i can't walk more than 20 metres without extreme pain which i get from arthritis which is a symptom of the Crohns Disease which i have. I also have mental health problems where i did say i can't understand directions or signs or timetables and i would get lost. I also told them that i was terrified to leave my home because i can't mix with the public because i think they are talking about me and i get angry at that