[Closed] Domestic abuse

How much do you take until enough is enough?
I met my partner 19 months ago. In that time I've quit my job to look after her kids while she goes to work and I do all the housework etc.

Now and again, we'd have arguments, which I put down to stress from nearly always being at home and not getting a break from it all.
Over the past year, I've had less and less contact with my family and friends and the arguments have become more frequent.

She (my partner) has a tendancy to lose her temper when she is stressed, and it seems that I've become the person that she takes all her frustrations out on. What with feeling secluded, mentally bullied and controlled, I've been wondering what I should do for the best for quite a while.
2 nights ago, she attacked me in a drunken rage. When i said I'd call the police, she phoned them first and alleged that I'd attacked her?!
Spent the day in a cell yesterday but was eventually released with no further action being taken against me.
My sister is a police woman, and has helped me through it all. Although she's putting pressure on me to press charges (I have a swolen face and bite marks to my body), I'm not sure if I can do it?
If I press charges, my partner will lose her job (care work) and probably her kids too.
Either way, I have to accept the fact that it's over and that I need to get out...
My head is a mess and I'm about to try and rebuild my life. Any help or advise appreciated.
Sorry for the long post!
Sorry just noticed, wrong forum 🙁