Vitex made cycle irregular?

Nicola • I`m a 32 year old teacher from the UK. Had my rainbow baby in September 2017 after miscarrying twice. Had a chemical pregnancy in January and now TTC #2
Has Vitex caused anyone's cycles to be all over the place? I had a chemical pregnancy last month. 5 weeks later I have not ovulated or had any signs of AF. I've been taking Vitex and heard good things about it regulating cycles, as usually I ovulate around CD21/22 and have a very short leutal phase. Just wondered if there are any negative comments about it? xx