Hi , so I've found a large lump in my breast and I've been booked in for a mammogram however I'm terrified that it's something bad. The lump is as wide as a golf ball but is kinda thin , my boyfriend had found the lump months prior however neither of us noticed that it was a lump. I'm now starting to get some pain around the lump and my nipple is kinda leaking. I'm really worried about what it could be. Has anyone else gone through this or can they give some advice?