Bowens Disease - GP has given me some cream to use, but should I have been referred to a dermatologist?

I've had an itchy area above my ankle for a few months and when it's weeping it takes ages to heal. My GP thinks it's Bowens Disease and has given me some fluorouracil cream to use (I have to say, the dermatoscope pictures on the NHS website look remakably similar to mine). I'm concerned that we've gone straight into treatment rather than a referral to a dermatologist. Should I be worried? I'm on an immunosuppressant. Any thoughts?