If ur on a valid h1 rt now tehre shouldnt be any problem. I know someone who went to nepal after 10 yrs and got stamped for h1 and came back again. He t00k 10 yrs to get his undergraduate degree, skipped few years of school and graduated....ofcourse this all happened before sevis started. He went home got stamped...stayed in nepal for 4.5 mons and just came back last month. Interestingly he had done his h1 thru one of those crooked dhoti agency and did not even have any pay stub. So looking at this, there shouldnt be any problem for ur case. But again its never 100% regardless.