Machapuchrre Congratulations on your upcoming marriage.

Madeshi is right, but once your spouse becames US Citizen then  your statues will be changed  in  6 months. so you have to wait till she becomes US Cititzen. Marrying GC holder makes no diference in your status. She can file I-130 for you but you  have to maintain legal status in your own way. 

If you are from STEM major, you can extend your OPT another 17 months or go back to your previous school  or find some cheaper community college and wait till she becomes Citizen.