hi m neha,25 yr old female,wt. 47 kg.Usually my cycles are 30 to 33 days.But for last 16 months its very irregular going upto 38 to 40 days.i consulted a gynecologist,she prescribed me estrogen pills..but now i m feelinf nausea,tenderness in breast,epigastric discomfort.Last year i got a fibroadenoma breast removed.Is it safe to take estrogen only pill.How long should i take this?