Please help accutane?

Well iv been on Accutane for id say about 3 weeks, and the past 2 weeks iv been realizing when i go to the bathroom to do number 2 its been hurting really bad and when i wipe theres a little bit of blood but its more like watery blood and its very very little? i know accutane causes Crohns disease, should i stop taking it bc its not worth harming myself? Help please, i have no stomach pain or anything and its not bloody stools they are normal in color just very painfull?