yes it can, such as increased breast size and tenderness, and some people feel nausea as well. howeever, one thing it does do is keep your period extremely regular. mine was very irregular, it could be every month or every other month, but after i got on the pill it has come on the same day for a year now. being a week early would be unusual on the pill, especially if you have taken them correctly. people's bodies react differently to pills though, so maybe it is normal for you.
Defintitely. When I used to take the pill, my breasts were always extremely sore (tried all of the different kinds of pills with different hormone levels and nothing stopped them from hurting). I also felt bloated all of the time, and occasionally even felt really light waves of morningsickness-like symptoms (without ever puking). I finally switched to the NuvaRing form of Birth Control & love it. You don't have to remember to take it, you can't feel it, and for me, it alleviated all of the symptoms described earlier.
Be careful with nuvaring. I kept getting severe vaginal infections, that i could never completely get rid of. My doctor told me that nuvaring can harbor bacteria and yeast. I switched back to the pill, and I haven't had any problems since. I too had morning sickness with the pill (ortho tri-cyclen lo) to the point of vomiting. Try Yasmin, it's much better.