My 15 year old has been on meds for almost 2 years, has self-harmed, been briefly hospitalised (think that was an over reaction though) and continues to have depression and anxiety. plus her meds are making her gain weight which is a whole other issue.
Yes it has put a huge strain on us all. what has helped has been:
not blaming anyone, especially each other
setting a clear set of not very ambitions goals for her/us (for us it was complete school year, make a friend etc)
Look sometimes at the good bits - it is great that your dd has friends and that she does go to college
We are both seeing therapists ourselves to help us deal with this
Family therapy with a brilliant therapist has been the most helpful thing - for all the family, siblings too.
our therapists all tell us stories of teens/young adults who really struggled and then came through it, did ok, are living independently and happily.
If she still is having panic attacks then ask for a review of her meds. Our second psychiatrist more or less said the goal is to put the depression/anxiety into remission and I don't think that is unreasonable.
Ask for and take any help you can. Our dd's school is completely on board and very helpful.
best of luck. It sucks really but so many people come through it, survive, and do the best for their children and there is a joy in that in itself.