I'm soo upset and hurting right now and don't know how to deal with all this negativity in my life, there's alot going on.

Here's a list:
-My parents are alcoholics
- I'm trying to form a relationship with my schizophrenic nana.
-My uncle has attempted suicide.
- My partner is severely depressed because of numerous reasons, he's lost his grandad who was his father figure, his uncle recently passed away from a terminal illness and then recently he witnessed a colleague get crushed to death in one of the aparatus at work and tried to save him but couldn't :(
- My teenage cousin who has gone off the rails wants to come and live with me but can't do this as I'm currently looking after my partner's nan since shes deteriorated alot since the deaths of his grandad and uncle so now we need to move in with her to take care of her.

So all this crap is going off in my personal life , alongside with doing my part time degree and then to top it all off .

Working life:
I was fantastic at my job and have done so well but it was a workload for 2 people so they have employed someone else who is another version of me , the same job title etc. I've trained them up but because all of this personal stuff is happening my life I've felt exhausted so this employee ended up getting tense and started to do all the work but not giving me a chance to do any of it so it looks like I'm the bad guy.
What makes it worse another colleague has gone into their head to make them believe that I will just let them do all the work and that I have management to support me through this which makes it a very volatile place to work at !
Especially when this management that likes me is under investigation so I'm currently looking for another job.
It's like I walk into one shit storm to another !

Someone please give me some advice out there , I need to get my life together and I feel like it's starting to fall apart and I don't want it to when I've worked so hard and have given it my all !