I don't specifically remember running a fever during a flare I'm sure there's times I have, but you don't need to be running a fever to have a blockage or even be in a flare. I don't even run a fever if I have an abscess a lot of the time. If you're still having BM's and gas, you're "probably" okay. Are you throwing up? That's usually the key for me, emptying has either slowed enough (partial blockage) or stopped (blockage), making me throw up (on top of the pain).
That said, symptoms can be different for everyone. If the pain is too much to bear until you get to see your GI, go to the ER. Usually if I'm trying to decide if I should go to the ER, it means I should.
You may want to call your GI and let him know, maybe he can put a call in to let them know you're coming and what may be going on.
49 years old, Crohn's Disease
Six resection surgeries, permanent ostomy, adverse reactions to Remicade, back on 6MP for maintenance, hoping for a long remission from this last surgery.