What do you do when it all gets too much?

I’m moving away in less than a fortnight to go to University, I left work to leave some time to relax, see family and get everything sorted. However the past few weeks I have been bogged down with money worries which weren’t helped by my bank being completely unhelpful and pretty harsh. My money problems have in turn affected my mum whom I pay weekly keep (rent) as she no longer gets child maintenance for me because I’d finished my A levels. With that being the main thing on my mind other things have started to slip, friendships, family relationships, my general health and wellbeing and my relationship with my boyfriend.
So I was just wondering how everyone out there copes? What do you do when everything gets too big for you and too much?