Last night my DD (22 months) actually slept about 5-6 hours straight (hooray!) last night. However, I woke up with a very, very sore boob, and I just don't feel right. I feel a little achey in my hips and legs and just can't seem to get comfortable. I had a hot shower and tried lots of massaging and hand expressing. I still don't feel right, and now feel quite shivery (though that could just be because of the hot shower?).

Could this be mastitis? I've never had it before or had any experience with it. Can it come on this quickly? Should I just wait it out?