Have you tried practice problems? and from what book(s)? What was your score on those? Did you approach those practice problems differently, and how might you apply this approach to when you're taking a practice FL? I think very low PS/BS scores means that you are too weak on content. It could be the kind of thing where you know it when you're looking at a textbook, but when you're asked to apply it to something, you freak out because you've never had to use the information in the way they're asking you to.
It could also be that you really are just way too nervous when you're taking the exam. Or, you have poor logical reasoning skills. These two things are certainly fixable, but I don't think it's the type of thing that will happen overnight (or in two weeks, for that matter). Some people do get locked up when they are taking standardized tests, and the only way to really combat that is to practice, practice, practice (using something other than AAMC FLs).
Either way, those scores are not promising, especially considering you already have a significant number of FLs under your belt.My advice is to delay until September (at the earliest), more probably January if your schedule permits it. If you take the test in two weeks, I would be prepared to get somewhere around your AAMC average, maybe a little higher at best.