A few thoughts:
1) I took the test today as well and in my opinion, it was HARD. I skipped 11 questions and guessed on 3-4; on the September 2014 exam, I skipped 8 and guessed on none.
2) According to the latest practice exam scoring guide (http://www.ets.org/s/gre/pdf/practice_book_math.pdf
), your estimated raw score of 37-39 places you at the mid to high 60th percentile. But then again, this test was difficult so you actually might have scored a bit higher.
3) 42 out of 66 questions isn't bad for a non-math major. Since you have 6 months until the April exam, study hard using the materials people have referred to on this forum and you should be in pretty good shape. Try to get to a point where you can answer 55 or so questions on the practice exams in the allotted time. Even if you get a few wrong, you should be in the 80th percentile, which is good enough for most of the top schools.
Don't be discouraged - the test exposed your weak points but you can use that knowledge to get better for April.
Hope that helps!