I agree with the advice you're getting. You need to get to your GI very soon.
When in a flare, the disease is causing damage. You may need a short round of Prednisone to get things under control. This should be fine as long as you haven't been on it in a long time.
ALso, the 6mp may be a good choice for you, but to arbitrarilly put you on 50mgs. may not be effective. You need a metabolite test to see what the optimal therapeautic dose should be for you.