a) call scheduling and have them add you. its a stage. theyll override you for whatever time you want.
dont waste money on review flights. STUDY. hell, ESPECIALLY with stage 14 theres NOTHING you need the plane to practice on, load up flight sim and go at it. chair fly. read and re-read. a review flight for stage 14 is a waste of time and money.
lose the girlfriend.
there is, and always will be others. school should be your priority for now. buck up, hit the books, and finish. then you can have time for whatever romantic stuff you want. or find a girl here, theres some out-of-state/international ones that aint too bad. (obviously stay away from the local livestock)
if you wanted a fast track, go to ATP. myself, and most others here came here to kill two birds with one stone (degree and ratings simulaneously...on student loans! ;-))
getting stopped or held up for a week or two, even more, happens once in a while. theres NO reason however that theres weeks between EVERY lesson. make an effort to get out there and fly ANY time possible and you can do it. so far, taking breaks to go see girlfriend or whatever doesn't really convince me you're trying to take every possibility to get your flying in.
good luck, pass the stages on the first attempt, and study study study study study. theres no reason to unsat/repeat lessons.