Bereavement, Guilt and Feeling Lost

I lost my father and my last surviving parent at Christmas

I'm in my late 30s and I'm feeling totally lost

My father was my best friend,  I wasn't the easiest of people to live with especially when I was melting down, when his health declined my fear started spiking and I was melting down with worry and anxiety and stress as I was the only person around to help him

I was also in the middle of finding a job which was stressing the hell out of me as I was just getting rejected over and over

Took a temp job but he ended up in hospital on Christmas day and died 3 days later 

not sure what to do now tbh

I feel like my world has ended, hate being so lonely and my guilt is destroying me

Had the police out so many times doing welfare checks and the MH services are now involved