I've been on the progesterone only pill for just under three weeks now. Yesterday my nipples started hurting a bit and today my boobs have been getting more sore all day and I reckon I've gone from a D cup to at least a DD if not E in the last day or two. Has anyone had this with the pill? Did it last or did they go down again? I'm really uncomfortable and am tempted to go and get a new bra tomorrow but it would be a bit of a waste if they're going to be back to normal in a couple of days.