I overstayed unintentionally due to misunderstanding of the grace period timeline after my OPT expired. It's been about a month and I was wondering if I can file I-539 to extend my stay? I just found out about my legal status not too long ago and I'm very upset about it. I am planning to leave as soon as possible but the booking agent said the earliest flight she could book for me is in late February. What should I do? I hate to be here illegally. Even though my OPT expired, my passport, visa, and I-94 are still valid. Does that count for anything? Thanks in advance!

