The very first fact is that if your visa been already expired and you are traveling outside states surely now you need new stamped visa to enter USA again. And if you are going India now, why don't you stop in Mexico and apply for visa and then travel to Asia or wherever. Cause I have seen my friends who have not been denied in there. In Nepal, heard things are complicated, but I won't say it's that so tight too if your papers are clean. Good luck.