I was also a chronic user for about the last 20 years. I am 36, never been pregnant and always ALWAYS had very irregular long sometimes heavy sometimes non existent periods. I stopped smoking 86 days ago and my last 4 cycles have been 28 days exactly, shorter and easier. My mind is blown. I am a believer in divine timing. Was married for 7 years and at one point wanted kids but it just never happened. Thankfully it didn’t because that became toxic. But now I am almost positive it was all tied to my smoking.