I'm on the 8th day of my 5th pack of the combination pills. I've never experienced any serious side-effects, so when yesterday my breasts started to hurt (on the sides), especially the right one + the nipple - I got a bit worried. I had sex during the break week on the 3rd, 5th and 6th day, and then on the 10th and 12th day, counting from the first day of the period. Before the break I took 1000mg of Vitamin C because I was sick (and had sex but don't remember the dates), and now I am worried that the vitamin could have "weakened" the effecs if the pill (or at least that's what the internet says). Other than that, I am a nearly-perfect user. Do you think there's a chance of pregnancy? I haven't taken a test yet.