Universal credit UK advice please

Can you tell me how often are universal credit appointments. Am going thro similar situation. I was signed off by doctor. After my miscarriage for mental health am still struggling but had my 12 week period off on jsa . What happens next ? I suffer severe anxiety and get upset stomach and run to toilet with nerves everytime I have a jsa appointment. They are not easy to talk too about my anxiety problems I've no idea what to do next I've had diabetes and managed to put it into remission lost 28lb but my thyroid had went overactive now

Causing me worse anxiety as my hair is falling out all the time x