I wasn't feeling well for 7 month - got a herbicide poisoning, my periods got very light during this time. Now I started feeling better this month and expected my period to go back to normal, but all I got was a very slight spotting! Will my periods go back to normal, I'm not on birth control of any kind, haven't had intercourse. I have read about chemo (also chemical poisoning) and sometimes the period goes back to normal, depending on woman's age.