... weeks ago, so I was going to start it with the beginning of my next period so that it would be working by early June, 6 weeks from now. The problem is that my periods are rather irregular, and it is not uncommon for me to skip one when I am stressed. I'm guessing that is what happened, so it is possible that I may not have one for another few weeks. If I start it now, when I have not had a period recently but I still have just over a month until I need it to be in my system and working, would it be alright, or would there be any major adverse effects to me doing that?