there should not be any problem if your h1 is confirmed if not dont leave usa.Best thing would be to wait. i know lot of people who have had problems in past. if ur opt is expiring in august . you could take the 60 days extension for opt.but if you have already considered that than you could join some professional institutions like kaplan which will be cheap to maintain your f1 status until Oct. i think to go to Nepal should be your last option.