VITEX and INOSITOL

Hi Ladies! I started taking vitex this month (April 1) and then after 2 weeks I took inositol. I have irregular period which is I have it monthly but it's unpredictable (36 days average). November 2015 my doctor put me on serophene and I took it for 4 months but no luck, I noticed that it made my cycle regular (30 days average) for the past 4 months I had my period every 25 or 26 of the month. I'm just worried right now that maybe vitex or inositol ruin my cycle because 25 soon and I don't experience any PMS like before and there's no sign of pregnancy. 😢