Hm... Presuming that English is not your first language (as you are from Libya/Turkey), I would advise that you try to get as much exposure as possible for the reading section. Just reading regular articles from popular magazines/newspapers and short stories should be quite helpful, since the texts that are normally picked for the SAT I (in my experience) are not usually too technical. The multiple choice tends to be a bit trickier, though, since for some unknown reason, the College Board likes to pick some of the most obscure words possible. If you're a non-native speaker, you will probably have a hard time eliminating options based on how they sound or their proximity to other words. SAT prep books tend to be quite good about this sort of thing, though, and many have dictionaries of terms that I would suggest you take a look at to have some familiarity with the vocabulary. I would also suggest doing past/sample tests and making sure that you time yourself to see if you are taking too much/not enough time on certain sections.
Lastly, don't stress out about it too much. May 2nd still gives you a fair amount of time to prepare, the preparation might just be somewhat intense. Do as much as you can, but I wouldn't worry about trying to memorize every single word in the English language.
Best of luck,
illu45