[Apathium]

I am taking the JLPT level 3 exam in exactly 15 days. I only know level 4 grammar and vocab and about 150 Kanji. I'm a self-study student. The maximum i can study a day is about 2 hours. If i study hard for the next 15 days do you think i can pass it? I don't know any good grammar sites that focus specifically on JLPT grammar that explains instead of just giving examples. I can't switch to level 4 now so it's either pass or fail. Any help appreciated. Thanks.