Hi there and welcome to DWD.
It sounds like you've so much going on right now that I'm not surprised you're struggling. I'm sorry to hear about your Mum. Are you allowing yourself to grieve for your loss at all? I assume you have been able to kick out your ex?

Have you spoken to your Dr about how you are feeling? Are you eating and drinking (non alcoholic) enough? Are you getting some exercise? What about talking to friends about how you are atm?