I think you are asking if you can continue to apply for student loans while you are in a Chapter 13, and you should be able to do this provided you obtain proper permission from your Trustee and the Court. Hope this perspective helps!
Aside from the fact that the situation doesn't make that much sense...if you are unemployed, heading back to school, how (why) are you in a chapter 13 bankruptcy (monthly payment plan). In any event, your chapter 13 BK trumps any other possible student loan status. Basically, your loans are in bankruptcy hold.
I think you best get with another lawyer and start sorting through your issues. Something has gone off the tracks based on what you described so it is time to reevaluate your best option.