IMO since you're only 3 weeks into 250mg of test E, 20mg ED of Nolva will be more than enough. Besides your nips are only itchy, you don't have any lupms yet. I don't think you need letro.
Ghost is right tho... if you had lumps letro will knock them out quick.
By the way, I have a question while we are on the subject. When you stop taking letro should you take Nolva right away to prevent the lumps from bouncing back?