If you need immediate support to keep yourself safe, please call 999 or go to your nearest accident and emergency department.
A number of useful crisis services and helplines are listed on Mind website: https://www.mind.org.uk/information-support/guides-to-support-and-services/crisis-services/helplines-listening-services/
Additionally, you can find your local NHS urgent mental health helpline in England here: https://www.nhs.uk/service-search/mental-health/find-an-urgent-mental-health-helpline/location