Thank you for the query.
First of all it is necessary to find the reason of your first small intestine
obstruction. Where there any histopathology tests performed of removed intestine? It should be done as obstructions usually do not affect healthy people. And if there were intestine resection it has to be narrow, otherwise there is no reason for intestine resection. Such narrow intestine if no cancer was found, may be caused by Crohn`s disease. And if so, it is just a matter of time for another obstruction if not treated.
So the first obstruction must have some reason, all other obstruction can be explained with adhesions after surgeries. Without this information it is very hard to help.
Your current symptoms are probably caused by another obstruction and if so, all tests can be negative and only surgery can help.
Hope this will help.