I tried S&D, it is so stressful. I sometime got lost in the paragraphs. What method are you working on ?I struggled with RC a lot too. You still have three weeks to figure out what methods work best for you. You should try different methods on the practice tests and see which one you feel the most comfortable. Then stick to it. And know your weaknesses and then figure out strategies to improve. For instance, if you read the passages too fast and seemed to not understand anything, then you should slow down a bit. Hope this will help.