Can Intake Of Multivitamins, Folic Acid And Tea Cause Irregular Periods?

Hi, I have always had a pretty regular cycle- between 23-26 days, however I am still waiting to get my period and it has been 32 days. I have been preparing to try for a baby (we haven t started trying yet) so I started taking Swisse Pregnancy + Ultivite, however I got my last period after 28 days so I stopped taking them and started taking just folic acid tablets. I have also been taking Magnesium tablets but stopped taking them because they were causing an irregular heartbeat. I had a full blood test and everything came back clear. I do stress a lot but I always have been this way and its never affected my periods before. I also decided to do a TeaTox which I started at the end of March but finished that on Wednesday. I am just trying to work out why I haven t had my period yet when this has NEVER happened before. I am stressed about it because now we want to try and start having a baby and I can t. I guess I m just wondering if multivitamins, folic acid and tea can affect your cycle? Also I ve had a pap smear and am waiting on results. Do pap smears tell you if you have PCOS?