I'm 19 years old, about two weeks ago I began to bleed which was supposed to be my first period of January and I took a new pack of birth control to stop the bleeding so I wouldn't get my period that week, I only took it for 4 days and stopped and 2 days later I took a Plab B pill. I was hoping to get it last week by it never came and now it's the 3rd week of January and my nipples seem to have gotten darker and white little dots around the areola of both nipples. Is this a sign of pregnancy? I should add that last week both my nipples were very itchy and irritated after wearing a certain bra, I've also moved to a very hot and humid part of the country, if that helps with an information you can give me.