First of all I am sorry for your loss, it is never easy to lose someone. It is common to ask ourselves the what if's when someone close to us dies but that won't change anything. It is not your fault your mum died, unfortunately these things happen sometimes. You did your best in the circumstances you were in. Your mum wouldn't want you blaming yourself, she would want you living your life. Is there a close friend or family member who could help you out with your bills? Otherwise what about trying
Citzens Advice Bureau or even talking to your school. Do you have a counsellor? As it might help to talk to someone about what has happened. Take care
Kat xxx