So not the 29th birthday present I wanted. Was in the shower and felt this large hard lump. I can't be sure but I believe I've had trouble with this before and it was just breast tissue.... But I don't know as the other breast I can't feel the same. I wasn't examining as examined not too long ago, I just felt it when I was in the shower washing. My breasts are tender at the moment as I'm near my period. I will book a gp appointment. Trying not to worry.