I've been using Zovia 1/50 for probably 3 years now and only recently have been noticing significant changes. Undergoing immense stress at school and intense workouts, I have noticed my period to be much lighter than normal (something just presistant spotting). However, I had what I would call a normal cycle last month with bleeding ending on the 27th of December. I am two weeks into my pill pack and yesterday I had minor spotting and today what I would call a full blown period. Does this happen randomly or should I be concerned? Thanks in advance!