"i have been on lyza for 6 months. i got my period the first month after beginning, and have not seen it since. i was not having any side effects until recently i have been having very tender breasts, mood swings, and bloating. i have taken two home pregnancy tests and both came up negative. i have gained 5 pounds since beginning lyza and i do like it, but not menstruating is scary, especially when other symptoms begin to show up, similar to pregnancy side effects."