Sore breasts

My breasts ache today. In the back, by the underarm, kind of where the breasts start. They just feel so sore, especially when I move my arms up. They also feel stiff, not soft and jiggly (hehe) like normal. I usually don’t get sore breasts but when I do, it’s my nipples that hurt like crazy. I also don’t have any other symptoms of anything this month. No bloating, irritation, sleepiness, low libido, or anything. My CM is even dry and normally I get quite a bit of discharge before AF!!! It’s all out of whack. I’m confused. I’ll probably force myself to test tomorrow (10dpo), not getting hopes up, but.. anyone else experience this?