don't take risk bro....its very tough situation to enter every country....UK Australia or US....i guess u know the reason....visa expire means u hav go through the whole process of interview and stuffs to get the visa again....goin canada and then enter US by showing I-20 is one option however i think u need visa for Canada in that situation...

last december two of my frens went to nepal and while returning , US immigration didn't let one of them to enter US so he had to return back 2 nepal. the reason was he had less then 2 gpa at that time. Even he had valid visa.
So i think goin nepal without a visa is not a good idea