How likely is it that this is from pregnancy (read on)?

My have been very sore. My are darker in color and also have white-ish "pimples" on them. They have actually grown an entire cup size in 3 days! I'm having cramps and twinges in my stomach and muscle aches in my legs. I had every other day from day 7 to day 14 of last months cycle. What are the chances that this is pregnancy and not pms? Thanks for any answers!