Gedarel 20/150 pill and more regular periods

This was prescribed to me to help regulate my periods; however did the complete opposite and have made them worse. I have no clue when my periods are going to begin or end now, as well as if the bleeding will be light spotting or extremely heavy. I have become incredibly sensitive to many things that would never have bothered me pre-pill, as well have been bed bound due to negative mood changes that I have no explanation for. I have been sad before, however, these feelings I could not explain or combat so I have decided to switch pill.

I changed to this pill because I was feeling sick on pills with higher oestrogen levels. However, I have been taking this for 2 years now and have noticed severe weight gain. I have gained 14kg in 2 years which is around 2 stone, (28lbs). This has severely impacted my mood and overall quality of life. I have also developed IBS style symptoms over this period of time which have gone unexplained by GPs. I have seen other's post that their pill was responsible so I am beginning to think that this might be the case with me too. Trying to find an alternative at the minute as I want to see if coming off this makes a difference or whether the weight gain and IBS are just my own doing.