Regressing on my PTs

I have been studying for around 25 - 35 hours per week since May. I started with a diagnostic score of 152, and after about 6 weeks of studying, hit a consistent score of 165 and saw some major improvements. However, the past two weeks I have been getting 160s and 161s on my practice tests which has resulted in a loss of confidence. LR has always been my weak point, but I have now seen a decline in my LG and RC sections as well. I am getting extremely frustrated because I thought I was on track to hit my goal of getting a 167+ on my LSAT in August. I am getting extremely nervous the test as it is approaching quickly. Has this happened to anyone and if so, what is your advice?