Lo is 10 weeks and has just started dropping middle of the night feed, when he wakes I have a lot of milk. Yesterday went out and wasn't able to feed from 11am til about 530ish. Today left boob feels very very tender like I have been punched really hard and is a hard to the touch at the bottom. I have no fluey symptoms but bad headache Is this most likely a blocked duct and how to I stop it becoming full blown mastitis it is sooo sore!