It happens. Hognoses like to go off feeding. If your hog does not seem lethargic and still has good energy don't worry. Worse possible thing to do is stand over your hog and watch it every second to make sure it eats. They can be a little shy. A deli cup should work well, or a SMALL paper bag. If you feel live, leave it live with the snake in the bag (or pillowcase if you can find a small enough one). If it doesn't eat it over night you can try scenting with tuna water (water not oil), or rub a hard boiled egg all over it. Hard boiled eggs aren't really got for your snake, but not harmful in small quantities.
As long as it is active, alert, and has good muscle tone don't worry. A little weight loss is to be expected, too. But ONLY a little.
I have two male hognose. One was aggressive and never missed a feeding, a little over a year old, and pretty big. He went off feedign for three weeks. I'm still waiting for him to start eating again, but since he stopped eating he is very tame, handlable, and probably one of the sweetest snakes i have in my collection. So, in my opinion, my hognose is going through moodswings associated with puberty (about the right age). I also have a younger male who stopped eating, but i'm not sure why. He has only missed one feeding, but ate like crazy before.
So, give your snake time, check on them daily, and they'll eat once they get hungry. Just be happy you don't have a southern hognose that's going off feeding, they are a pain in the butt!