I came to US on H4 and my husband's H1 extension was denied and got my H4 expiration letter in September 10 2009. I have already applied for a school and got I-20 on June 19 2009. I have done 1 semester(fall 2009) as a full time student but I thought my status is changed to F1 by the time I got my I-20 as I didn't know that I need to apply for COS. Now I realized that my status is not changed to F1 and my H4 was expired. My husband is on EAD now and he can not add me to I-485 until the dates are current. What are the options I have now. Can I apply for COS now sayng strong reasons for why I could not apply for it before expiration..?

I appreciate your help!!