Yasmin Breakthrough Bleeding, Evening Primrose Oil, Cramps, Headaches, Unbearable Pain

I did not see anyone posting with my problems so I don't know if they are side effects. I have been on Yasmin for 21 months taking the active pills only the entire time. I am taking it because I suffer from menorrhagea (unbearable pain during periods) and was unable to even leave the couch or bed for 2-3 days a month. Pain medication did not work and I bled so heavily that I had to change my super tampon every half hour. Sorry to be graphic but I want to make it clear that I am taking this for pain and as an alternative to surgery. Yasmin really helped at first. I had breast tenderness but my gyno told me to take evening primrose oil and it took care of that. My debilitating cramps were gone and I got my life back. My husband was so happy because now we could actually do things without having to consult the calendar. I have only taken the active pills this entire time so I should almost never have a period but I have been getting intense breakthrough bleeding lately. I used to get it only every 6-8 weeks or less but now it's about every two weeks or more often and I have terrible cramps, headaches and abdominal swelling prior to it. At least one day is heavy bleeding. This just started recently. The blood used to be really dark but now it is like my period used to be just not as heavy. I also have developed a sensitivity to dairy products (gas, bloating, diarrhea), headaches, crying jags, short temper, dark patches on my face, and my feet hurt. It seems like I just started to have side effects in the last four months. I also get quick sharp stabbing pains that make me gasp at different places on my body; sometimes on my thigh, sometimes my arm, etc. Has anyone who has been on Yasmin for *over a year* started to have side effects after having none? Breakthrough bleeding getting increasingly worse? Stabbing pains? Please let me know. Also, does anyone know of another BCP that stops your period? I am desperate because I really like this pill and I am terrified of getting an operation. I had suspected that my ailments were related to taking it and found this board last night. Most posters seem to be new users and all BCP's made me sick at first so that's why I'm asking for the experiences of those who have taken it for at least a year. Thank you.