the pill and if I should be concerned

I have now been on the combined pill for about a week and 3 days. On Sunday I didn't feel to good I went really dizzy and the room was spinning... ever since then I have been getting slight headaches nothing major but there was a pain. Yesterday my stomach felt slight odd and then today I being to feel really sick... in the end I was sick but it wasn't proper sick. I'm not to sure what to do because I have been stressed lately from college work and family problems so I was wondering if my headaches have occurred from being stressed or if it was the pill. I'm unsure if I should go to the doctors or not?