I was averaging 16s on my sciences, 18s in math and pat, and 19s in reading. About two and a half weeks before my exam I posted a similar thread on SDN and a lot of members suggested I push back my exam date. I took the 2009 version a week before my exam and averaged a 17 🙁. I decided to push back my exam by three and a half weeks because something was obviously wrong with my studying.
With all this being said, the extra three weeks I took has drastically boosted my scores in my remaining practice exams. I think a month for you is enough time to see a change. I agree with gnieff. Make Destroyer your bestie and do not look over look the bio section. Going through the destroyer a second time is honestly what started to turn everything around for me. I haven't taken my exam yet but I feel a lot more confident at this point. Go through it twice and understand the answers and re-watch all of Chad's videos +do his quizzes. You will be surprised how much you miss the first go around even with good notes.
Finally follow up with Bootcamp and Qvault and make sure you pay attention to the explanations. Hopefully this helps!