What would cause my to be sore? (Besides pregnancy)?

My last cycle was May 10-16th. My s usually get sore a few days before I start my cycle. I usually PMS the week before while having no symptoms during. But for the past 11 days, my have been very sore. Just starting today I noticed my starting to feel like there's electricity surging through them(Weird, I know)... but it's literally like a surging feeling, if that even sounds right. And when there's no shock, it itches and is sore. There's no chance of pregnancy, and I've always had irregular periods, but it's been pretty regular the last few months, but I've never had this much pain in my s. They feel heavy when I'm not wearing a bra and they actually feel fuller/swollen, but don't look it. I have large , size 38D, if that matters. Also, would sleeping problems have anything to do with it? I've been extremely tired for the past month and a half, whether I get a full night of rest or not, but the past few weeks I've had far too many restless night and only slept for 3 hours last night because it took me 5 hours to fall asleep. Could it be stress? I would just like some relief so maybe I can pinpoint how to fix it, or at least know what's causing it. Thanks so much and God Bless!