I would be grabbing as much stuff as I could. I wouldn't want to loose everything, especially such a nice outfit. I'm at college and I was dressed when the alarm went off. I was wearing Jeggings, skirt, bra/panties/forms, a long black top, and boots. What did I do? I quickly took my forms out pulled my skirt up so it was around my stomach, put on a man shirt over my femme clothes. Then put a heavy jacket on (I'm in upstate NY and it was November for goodness sake), threw actual jeans over my jeggings and kicked off my boots real quick in favor of shoes. This took me about a minute and I was good to go.
The key is practice and you dont have to take off everything, stockings can be covered with jeans or sweat pants, a loose shirt can hide bra straps, and a heavy coat can hide your outfit. The make up will be harder, but you should focus on getting a routine down for getting clothes on