GMAT Prep 640 - Morale boosting needed (GMAT on June 21st)

Took my GMAT Prep I today, scored a 640 (Q48, V30) 05/31
Took MGMAT II last week, scored 320 (V23) (skipped Quant, just verbal) 05/23
Took MGMAT I two weeks ago got 600 (Q41, V31) 05/16

Haven't felt comfortable with the verbal section yet. I have been unable to finish the exam on time at all instances, I am atleast 3-4 question short towards the end (both verbal & quant). When I look at the stop clock, I seem to panic towards the end.

Looking at the score trend & the exam date (May 21st) , CLEARLY, I seem to be from my target of 700+.

I am really struggling with the verbal section (I am a non native speaker). Initially I thought I was very week in RC & will do comparatively well in the CR & SC, but it seems to be contrary. I am faring well in RC (at least the comfort level) & literally struggle with CR & SC. Annoying part is that I have gone through MGMAT SC once (left the advanced section coz wasn't able to understand). Done Powerscore CR once & MGMAT RC as well. Quant, although I used to feel confident in it but that confidence has been shattered off late (look the score for gods sake!!!!). Week areas are inequalities & data sufficiency.

For practice I have used OG 12 untill now. To do the better in the verbal section, I am thinking of doing both MGMAT SC & Powerscore CR Again. I also have 1000 Q-Bank for (SC, CR & RC) & OG 300 (Verbal & QUANT) which I would probably use.

Frustrating part is that I am really putting lot of time and effort in my prep & still am not getting the results (feel like crying right now). When I do practice questions from individual topic or section i.e. RC / SC / PS or DS (I time the questions when I do them), I score well. But when doing a sctional test (either verbal or quant) , I struggle.

I know its a long, story but just want to get some motivation/inspiration from you guyz so that I can get going.

Any comments / tips from the GURUs of the club will be really appreciated.

Thanks
Shane