Do you currently have active Crohn's? If you do, that's most likely the cause of your fatigue. Secondary issues, e.g. anaemia, medication side-effects, can also cause fatigue. Strictures by themselves don't cause fatigue, although in my experience partial obstructions are very draining. You don't mention having any obstruction symptoms though.
I can't answer your question directly, since I've never had a balloon dilation. I can only make educated guesses. It's hard to know what to advise to be honest. Hopefully other people will chip in, but balloon dilation doesn't seem to be a very common experience.
One more option for you to consider if you have multiple, short strictures: strictureplasty. If you haven't already, I'd book an appointment with a colorectal surgeon to discuss surgical options - a surgeon will know more than a GI about
Dx Crohn's in June 2000. (Yay )
Tried: 5-ASAs, azathioprine, 6MP, Remicade, methotrexate, Humira, diets.
1st surgery 20/2/13 - subtotal colectomy with end ileostomy.
2nd surgery 10/7/15 - ileorectal anastomosis. Stoma reversed and ileum connected to the rectum.
Current status: Chronic flare. Do I have any other kind?
Current meds: 50mg 6MP; Entyvio (started 3/11/16)