The scopes only see the very beginning and very end of the small intestine - and as you probably already know, Crohn's can manifest anywhere in the digestive tract. So no, normal/clear scopes do not automatically mean it's "just IBS" - if that ends up being the case, ask for more tests to look at your small intestine. Have you had anything like a CTE or MRE, pill cam, or small bowel follow-thru? Those would be the ones to ask about in the event that the scopes don't find anything.
I hope you don't even need to worry about this though, I hope the scopes find something relevant so that you can get some proper treatment and relief and get back to living your life. Good luck and keep us posted! Oh, and make sure they take lots of biopsies with the scopes too. Some things (such as microscopic colitis) can ONLY be seen on biopsy.