So I’ve been taking combination birth control pills for like 6 months. It’s the type of birth control that doesn’t let you have periods until the third month. During the first three months I didn’t get any changes to my body but this 6th month I just realized something different. My nips are a bit darker than usual. I did have sex on the 21st of June and that was the last time I’ve done anything of that sort. I haven’t felt anything pregnancy like either. Is that a birth control effect?