I ve currently been switched onto the Cerazette contraceptive pill, 10 days ago I finished a heavy and painful five day long period, only ten days later I ve now started another period. I was on Microgynon 30 and had periods at the same time each month with only a little bit of pain, I know that it s quite common to have irregular bleeding when starting a new pill, but I ve started taking Sea Kelp tablets again too and I m just wondering if it s okay to take them both together? I m 19 years old, weigh 8 stone 4lb and I m 5 foot 5 inches, I have been taking Cerazette for 20 days now.