Apologies if this has already been posted, but I thought it couldn't hurt to re-post anyway. This article from Mind has some very good advice and ideas for dealing with worries and coping with social distancing or self-isolation (whether you have any mental health issues or not) - hope it might be helpful:
www.mind.org.uk/information-support/coronavirus-and-your-wellbeing/?fbclid=IwAR0CBxfdEVkOvwbRK_QXXiahxlFRVrAPtPmOLOhu9AtUyiNz9WoUUNDQHw0#collapseeae6c