You have an excellent GPA and your resume with 3 years working in a dental lab is going to look amazing.
With your scores I think a 19-20 AA is very doable and that with your current scores you will receive a score around that if not higher
My QR scores were: 19; 21, and 18 for the three bootcamp practice tests I took but I got a 22 on the real thing. Bootcamp is slightly harder on the real thing.
The trick to QR on the real test is the timing. I was able to determine pretty quickly if I could or couldn't solve a problem and so I skipped the ones I knew I couldn't do. If I remember correctly I skipped 4-5 questions. You will have some problems that you can solve easily but they take a long time to solve (at least for me because I didn't memorize some random formula) because I skipped the problems I knew I couldn't get I focused my time on these types of problems.
Your PAT scores are looking nice
. Don't let the PAT section of the test demoralize you stay positive no matter how hard you find it on the real test. I was averaging 20-21 on the bootcamp tests but got a 17 on the real thing. I attribute this to not staying focused on the cube counting (which are free points imo) also the hole punching threw me off but just stay clam and collected but also make sure your timing yourself. I felt a little down after this section but I wasn't going to let it impact my reading and math score (the PAT doesn't affect your AA score so just try to get 17+).
Bio is very hard to study just because you can be tested on so much. My test was extremely random. If I had to do it all over again I wouldn't focus so much on the very fine details but rather the bigger picture. I got a 20 on the real test and was averaging mid 20s on the bootcamp tests.
Your RC is pretty decent. My bootcamp RC scores were 17 and 18 for my first two tests but then improved to low 20s for the lasts tests. I just had to find a strategy and stick to it. My biggest advice leading up to your test is if your the kind of person that takes notes as you read (which I do) buy a expo marker and laminated paper (this is what your given on the real test). I wasn't able to write as fast or clearly as I normally would've been able to with pencil and paper so my timing was thrown off a bit so practice using what your going to be given on the real test.
GChem: averaged low 20s on bootcamp got 22 on real thing.
OChem: averaged 18-20 on bootcamp got 30 on real thing.
I spent a lot of time studying Chad's notes for both GChem and OChem and they were all I used to study the material. I think if you focus more time on studying Chad's OChem packets you will see your score greatly improve on the real test.
Bootcamp is harder then the real test so don't get discouraged about your scores.
You should take the 2007 free test and 2009 paid test offered. My scores were pretty similar to both of those tests.
Let me know if you have any questions about a specific section and I would be happy to answer.