It's a tricky piece. In my experience all piano playing, and particularly Chopin, becomes easier if to make sure that you are avoiding any stiffening of your wrist or fingers as you play, and that you feel calm and at ease when you practise. (Check that the non-playing fingers of your right hand always stay completely relaxed with your left hand, for example, while you practise the right hand, and vice versa).
Are there any particular things in that part you have questions about?