Hi Jane, typically, doctors are clueless when it comes to post concussive syndrome because it has a wide variety of effects and you have to experience it personally to understand its consequences. Typically, you'll recover in 3 months at the most. I recommend you just tough things out until then and assume you'll recover soon and feel the way you did before. Only after that time should you begin taking any sort of action (which this site is great for).
As far as coping with things, just be aware that many of the people on this website, including myself, have been through the PCS issues, short and long, and gotten through it while working and attending school. Its not easy, but once you get through it, and you will, you'll only be a stronger person.