@Applepea1 You absolutely DO have my utmost sympathy. Teen girls can be a bit of a pain. Moody, sullen, cheeky, lazy, grabby, and entitled.
Mine (now 26,) was a lovely child (and lots of fun to be around) right up to about 13 y.o. THEN she started to get a BIT like yours, (sulky, bratty, cheeky, entitled, awkward, and bit of a PITA!) Except she did go to uni, and stayed there and completed her degree. And she has had a job for most of the time since she was 16 (albeit sometimes only 6 to 8 hours a week while at uni.)
Like your DD though, she had a couple of jobs at uni, and lost them as they didn't need her anymore, but we KNOW she was ringing in sick half the time and letting them down coz she couldn't be arsed to get up!
We did spoil her a bit (as a child,) and didn't make her do much in the house, so it's not entirely her fault, but yeah she did become a bit lazy and grabby by her mid teens.. Not HUGELY, but a BIT. And when she lost her job (2 of them!) she kept running out of money as her student loan wasn't lasting, and she kept asking us for money.
It was so stressful as she was on the phone in floods of tears, and we couldn't do anything but help her (that's how we felt.) So we bankrolled her £100 to £150 a few times a term.
We have always been on a bit of a low income, and so we struggled. She got quite a decent amount of money at uni via her loan and grants and bursary (coz of us being on low income at the time,) and yet she squandered it.
The crunch came when she had £100 off us, and came home 2 weeks later with a nice shiny tattoo on her thigh. 'I've had this ages' she said. I presented her with a pic I took of her last time she came home (6 weeks earlier) withOUT the tattoo. Me and DH decided she would get NO more money now. Cheeky little shit.
She never asked us for any more money though LOL. We have always, and WOULD always help her, but dishing out 100s of £££ that we cannot afford, just to have her spend it on tattoos. Fuck that!
She had had a couple of other (smaller) tattoos a few months back, but claimed her 'friend paid for them.'
When we thought about it, we realised that was probably a lie.
And also, we had a few quite big issues with her at school (on and off for about 3 years!) With a few girls bullying her for seemingly nothing, and also her falling out with a couple of her friends. I had their mothers having a go at me, we had to get the headmaster involved, and the police a couple of times when one mother chucked a rock through our kitchen window. Fucking awful.
I always got the worst vitriol from the mums, not DH. It was me they gunned for. Even now, on the rare occasion I see one of these women, they glare at me - 11-12 years on! Thankfully, we don't live in that same town now, and rarely visit it, so only see them maybe 2 or 3 times a year.
NOW though........ our daughter is a vibrant, intelligent, hard-working, successful post grad, who is on twice as much money as us, she has visited 20 different countries in the last 5 years, and is now living with her boyfriend, and climbing the career ladder nicely.
She is strong, independent, and such a warm and lovely young woman who would do ANYthing for me and her dad.
SO... I am sure it will get better OP. 
But, yes it is bloody hard going when they are between the age of 12-ish and about 20!!! As I say, teens can be a PITA, bleed you dry financially, and can be cheeky rude and moody, but they do grow out of it (Most of them!)
You do need to tell her that she HAS to stay at uni, or get (and keep) a job though. And please don't tell her she is making you suicidal or depressed, just that she is making you very unhappy and sad (I think they may mean the same thing!!!) Maybe see if you can go out for a little lunchtime meal and have a mum/daughter chat, and be really nice but firm with her.
Yeah 19 is not a child anymore, but it is still very young. People need to cut the daughter some slack. Children don't suddenly become wordly-wise, emotionally strong, independent career women (and men) as soon as they hit their 18th birthday. It's not as easy as it sounds to just 'throw them out!' 
But yes, something needs to be done to help the OP (and her DD, and the whole situation.)
Also, OP, make an appointment with your GP to discuss your low moods, and see if you can get help.
Good luck. I really do wish you well 