Here, at long last(!) is the info on prescriptive authority for nurse practioners!(Sorry for the delay). It's got info for all the states, if anyone is interested to know for a different state.

From the site: lawatlas.org

The following is for Illinois dated up to Aug '14 (for this or any other state, click on the map on the site.)
APNs (advanced nurse practitioners)...Must enter into collaborative practice agreement with a physician, but they do not need to practice at same site nor have employer/employee relationship. State law does say how far away they may practice. Have prescriptive authority for meds of Schedule III - V. Schedule II can be too, but there are some limitations. Prescriptive authority is delegated by the physician in the collaborative agreement.

Those are the basics. They have a basic list, as well as link to the actual laws (by clicking on the little blue symbol.

Hope this info helps open up some options for you.

IMPORTANT TO ADD... I'm not saying you need meds or even necessarily get dx'd by nurse practioner, just that should it go that way in the long run, the info might be useful. If you do end up going this route, I'd be sure to get one whose speciality is psych.
I still really think it sounds a lot more like BPD than BP, and that you should definitely check into DBT. Doesn't need meds or a dx to do it ( of course!), and till such time as the other can be sorted out, it can help a lot symptom-wise. Something you can do while you wait for those.