My little girl had her first heat 5 weeks ago and since then she's had swollen nipples. I didn't really pay too much attention to it at first because I thought it was just part of her being on heat, but they've stayed swollen ever since. Today I was giving her a belly rub and I noticed a couple of them were cracked and sore so I rang the vets to get her seen later today. Has anyone had this with their dog before? Does it sound like a phantom pregnancy?