I do sympathise, as I have seriously oily skin. As a teen my parents thought I was exaggerating the problem, and even now don't understand why I still pay to go to a dermo.
Go to your regular doctor (I assume you can do this on your own) and see what he/she can do for you. I'm in another country so I'm not 100% sure if this applies, but here I am able to get a prescription for Retin-A from a regular doctor as an acne treatment, as well as Differin and various other antibiotics for the treatment of acne. Of these, Retin-A is most effective at reducing oil production and dealing with acne. For drugs like Accutane, which have a much stronger effect, yes only a dermatologist can prescribe it, but I think it would be worth seeing what your regular doctor can do for you given your limited options at present.
For over-the-counter solutions to combat oiliness, I suggest a combination of MAC Blot powder and Clean & Clear oil blotting sheets. A mattifying moisturiser may help a little (I use MAC Studio Moisture Fix or Paula's Choice mattifying moisturiser), but none of these options will resolve the root of the problem. I'm not really sure about Vitamin E, but if you do have very oily skin, there is very little you are going to get over a counter that will help resolve that. Anything which has that degree of physiological effect is going to be strictly regulated.
I hope that helps... I do know how you feel, even though my skin is much better than it was, I still have to blot 5 times a day like you.