HELP!! I was woken up to the horrible smell of skunk, I literally live in the city and I have smelt…

HELP!! I was woken up to the horrible smell of skunk, I literally live in the city and I have smelt skunk before a little bit like if there's one outside but this is different. The whole house smells like a skunk is in here and it sprayed, I checked there's not one here. And I have central air so everything is closed. It's making me extremely sick. What could it possibly be? What can I do for this horrible smell?. I'm seriously about to throw up.