Don't "push" uni...don't push anything. It's just not worth it. She needs to find her own way...in her own time.
My daughter had a very difficult period in secondary school...it included a major move away from her friends,getting into the worst company possible during her GCSE year, 18 months of going totally off the rails,hardly living at home,while doing her a-level years...and finally settling and getting reasonable grades. When faced with uni,she just was not ready for it...a breather was a necessity for her. At least in my eyes...not so much her father's. She then worked and travelled for two years...the best thing she could have done. It made her gain true independence,confidence and a degree of maturity. She then did 3 years of uni,getting her MSc....and then took another year off to go live in Australia as she was not yet sure if she wanted to do a graduate degree. * This was poo-poohed by dear sqad as not the right thing to do*. Well,it was for her. She came back refreshed and ready for another challenge. She is now writing up her PhD...and she will get a job someday!! ;-) :-D
How many of us look back on our lives and wish we had more knowledge to make better decisions about our futures. We expect kids of 17-18 to do so. It's a huge commitment,and harder for some. Give your daughter time with no pressure. She'll come out fine as long as she has your support.