Oh Yes, if you have valid F2 stamped while entering US and F1 status too (as you are dependend on F1), they might ask about your spouse F1 and his/her academic credit and GPA (keep a copy of those with you, if they ask at all at POE). I believe there should not be any problem but return to US 6 months before F2 status expires. If your F2 visa is valid for 1 month and trying to enter US, you might have problem. Not sure though. So always minimize risk when it comes to immigration matters. Enjoy your stay there.