I would say, give it a few weeks to allow your system to get used to it and if you're still feeling yuck and not yourself, see your doctor and discuss with them, based on your symptoms, which pill might be better for you. Honestly it varies from person to person. I used to suffer from horrendous life-altering PMT which was bad when I was off the pill and even worse when I was on triphasic (three colour) and biphasic (two colour) pills, and found that I got a really good result from Marvelon first and then Microgynon 20 which I stayed on for several years. Both of these are a single colour pill all the way around the packet as well as being a different family of hormones to others that are more commonly used. Best to discuss with your doctor or family planning clinic, they should have a chart of which pills are best based on what sorts of side effects you've had until now. I hope that helps.