Does Trigestrel Pill Have Any Side Effects?

Hi, my question is to do with Trigestel. I have just started the pill and was on Yaz. However, I have had my period for 22 days so I went to a clinic where the sister suggested that I stop taking Yaz and take trigestel immediately. I've read a lot of negative reviews on trigestel though and am scared to take it. should I continue with Yaz or try Trigestel?