So yesterday feeding ds2 on my left side was uncomfortable, by the middle of the night really painful & now this morning something I dread. My nipple & the area of breast around it are very painful & tender to touch. The nipple & areola are red, with the start of a small red patch on my breast. I also have an open milk blister that side 
Any thoughts on what this is? Just waiting to see my gp but wanted some advice, support & a bit of a moan about why, why , why does this have to hurt so much & happen today of all days!?!?