I don't understand why she didn't put you on another antidepressant when the cymbalta didn't work. There are many, many options to try. You need to be very direct with her and ask to be tried on another antidepressant. I may be wrong, but you mentioned telling you her symptoms of crying, but you didn't exactly say you specifically asked to be placed on another antidepressant. Perhaps you need to be more forceful in the way you ask. 2mg abilify is a really low dose (at least it would be for me), and I didn't find it did much for depression even at 15mg (despite what all the tv commercials advertise

).
I think you need to become the proverbial squeaky wheel about this. If you haven't been in for an appointment in 7 or 8 weeks (?), sounds like it's time to get in face to face and ask for her to take some action. You had a successful history with antidepressants, so it would make sense that they would still work even though you probably need a different one after all that time. (I'm impressed if you actually used the same antidepressant successfully for that long; they never work for that long for me.)
Sit down face to face with your pdoc. Ask her the questions you have about your diagnosis and medication treatment. Get a plan of action going. Don't be passive about your treatment. You have to really advocate for your treatment.
Your sleep hygiene sounds like mine. Getting on the computer in the middle of the night becomes a really bad habit that totally screws with your sleep pattern. Try to avoid doing that. Read something really boring. Try some relaxation exercises. Something other than technology; technology is not going to help you sleep. The dose of seroquel can also be adjusted; another thing you need to speak to your pdoc about.
Also, therapy will be hugely important in treating BPD, so if you haven't gotten established with a good therapist, work on getting that started also. Good luck to you.