im taking 500mg sust a wk. the past 6 wks have been fine, and out of nowhere i feel a lump by my nipple. it doesnt hurt at all. my nips arnt swollen or sensative. they are just hard kinda often. iv been taking 80 mg nolva ed, and now a have my letro. what doseage do u guys recomend? and does it sound like gyno. thanks