Re: what can this be
Are you running a fever, too? When I felt achy all over and was alternately sweating and freezing, it was a blocked duct. Was very tender and sore, especially in one area. Is it your nipples that are sore? If not, Lansinoh won't really help anyway. I would try taking some Tylenol for a day and see if it improves. Also, warm compresses will help if it is a duct. You say your daughter doesn't nurse....is that new with this problem or is that why you are pumping? Not being nosy, just wondering if the two are related.
Mom of 7 on Cape Cod