NSAID (non steroidal anti inflammatory drugs) are a no no for people with crohn's. Ibuprofen falls in the NSAID category. I'd highly recommend you stop taking them.
Tylenol in UK terms is just paracetamol. That's really the only over the counter pain killer that a person with Crohn's can take unfortunately. You should see if that helps manage the pain - and if it doesn't it may be time to visit the doc and ask for the good drugs
PV