Any women experienced this? You think I might be expecting a blessing?

For the past 2 weeks my brsts have been sore and itchy!& they just keep gettin more and more sore! I never have sore brsts unless I'm ON my period&maybe a wk before-and sometimes I don't even have it then. My tummy keeps itching every now and then also, I am also getting cramps, which is kinda weird, because my period was last week(without cramps), but only before my period I had cramps :/, and now its a week after my period and I randomly had light pink on tp, and the next day I had clear mucus stuff with light light light brown in it. & Today I'm cramping in my abdomen, and my brats are real sore! I took a preg test yesterday evening, but it was negative. I'm soo confused, they never ever are this sore. In the past 3 months my bf and I had maybe about 3-4 times each month considering we both work!! bout twice we used a condom but it popped once! and the other times we didn't use condoms, I am also on birth control(yasmin-28daily pills). I will go to the dr if symptoms continue