I have found a lump in my right breast just outside the bottom off my areola, I can feel it as soon as I touch the skin , I noticed it a month ago when it was pea sized and like an idiot put it to the back off my mind as ive had so much going off, yesterday I've checked again an it's now the size of a marble, it slightly tender if I have a good feel of it its smooth and round. I'm 41 this year, I have to go the walk in centre as I have not registered with a doctor in my area as yet,, I just need some reassurance please xx