Advice - Is it time to go?

Hi all - first post and just trying to put my problems out there and get some advice..because I'm not sure what to do any more and out of things to try. I'm 25/m and generally a fairly patient and level headed guy and have been with my girlfriend for just over a year and we live together. No children etc or anything like that. When we first met she was very sexual and fun and always liked to try new things and was a breath of fresh air..and that lasted for a few months...the situation now is very different. She has always had a firey temper and there are external factors which make that worse (which I'll explain below) but now every slight thing becomes a huge drama/issue with her screaming, swearing, kicking things, being generally unreasonable etc. On top of this she constantly lies regarding her consatnt promises to stop smoking, smoking weed as well as issues with contacting texting etc her ex husband and other guys (will explain more below). Ok so external factors - she suffered from endiometriosis for 10 years which is incredibly painful, very hard to treat and requires a lot of medication for pain relief, in may she had an op to check things and the hospital botched it and she almost died requiring open surgery for 7 hours to save her. Since then until a month or so ago I had to support us both financially which has drained all of my savings. After this we have had to go backa nd fourth to A&E almost 60 times when her cramping becomes too severe for her morphine painkillers to deal with which can be a very stressful experience for both of us. Complications have also meant that now sex can be very painful and she is even in pain eating - basically - a pretty hard situation for her so I try and be understanding of a slightly spiky temper at times! If I had been in pain for 10 years I'd most likely be the same. However, aside from these issues she is very selfish and thinks largely about herself talking about going to Australia for a year etc etc, buying weed etc while I now sit in debt and worry about money all the time. She has started working again when she can (although doesn't make much) but has yet to ever pay her full share of rent etc. I also discovered sexually flirty texts to another guy and emails with 'i love you, i'm not me without you" etc etc to her ex-husband. I addressed it and agreed to wipe the slate clean etc. Sinc ethen I haven't found anythign but she is very careful to always delete all her messages etc which just plays on my mind of what would have been there - she pleads faithfulness. Ok so the situation now is I don't trust her at all, i support her and stuggle while she doesn't appear to care and then every slight thing that displeases her because a huge issue where I can only explain it as she doesn't seem to have a grip on reality about what is said -no matter how i try and deal with it it's my fault. On top of that the argument only cools when I take equal responsibility for it - when I would say in all honesty that 90% of issues are caused by her behaviour. Equally when I am at fault I am lectured and chastised over it yet she never seems to click in relation to the issues she causes. The decision i need help with is what can i do to restore the relationship back to how it was if any and whetehr there is any point saving it. I care about her a lot but there is no doubting it would be easier without someone with her health issues and who creates such an eggshells enviroment where we try and tip toe around her temper and inability to just discuss and work out issues... anyway - rambling over for the moment lol hope it gives an indication someone can work with. oh one final thing - feel a certain amount of pressure due to having lived together for a year and met all of each others family etc to not be vieweed as 'having fucked it up' etc + (aside from the fact she rarely pays) it would be difficult to afford everything without her share - but is that worth putting up with this???? All help and advice appreciated - thanks!

Councelling