GMAT Strategy

I have been studying for the gmat since november, on and off after receiving a 510 on my practice test (17 quant, 41 verbal, I think). I have been working hard at improving my quant score and after taking three practice tests I scored a 43 and 45 on mgmat quant, and a 43 on gmatprep. Needless to say I was very happy with my improvement, and this was WITHOUT covering word translations/fractions (I use mgmat guides). Anyway I saw my verbal score decline from a 41 to a 31 (I haven't been working on verbal because I need a 550-600 for my target schools). I was devastated by the score drop from november till now. So I covered fractions/half of word translations and my quant score dropped from 43 to 39 and even 37 yesterday on gmatprep. I average around a 600. I feel like I have burnt myself out and my test is in two and a half weeks, great. I have worked through the first half of the sentence correction book and have learned a lot but haven't practice much. I went into this working on improving my quant score, I feel like if I try to learn the verbal section in the next few weeks my math score will suffer even more. I know I can retake the test again and I'm not very anxious, should I continue working towards my goal of scoring 40+ quant? I have learned the math and I feel all I need to do is review it, rather than half ass my math review/half ass verbal. Thanks guys.