Christie. Imuran is an immune suppressant and may inhibit your body's ability to fight infection. It is also contra indicated with salazopyrin, which may not be helping your Crohns at all.
Lansoloc is for heartburn? Fever is listed as a side effect.
Probably not doing much for your Crohns either other than masking symptoms.
You could do better with a friendlier diet. Simple bland foods, no sugar, very low starches.
What antibiotic did they give you?
If your WBC is still high you may need more antibiotics.
Flagyl is often prescribed for Crohns among others. You may need 2. Cipro, augmentin and
Possibly rifaxamin in addition to the Flagyl.
You also may need to try other meds for your Crohn's
When infection is present that can be tricky.
Budesonide may be appropriate but very important you identify the source of the infection.
You may have an abscess or fistula. that is very common and causes the high white blood count. MRI, ultrasound, stool culture are some of the tests that can help determine what's going on.
Good luck.
Also avoid surgery at all costs it's only a short term solution.