I felt tingling before the end of the first week I think. I mean, I don't think it was just in my head? Either way I was sure by the end of the week. By the second or third week I could feel buds. Now I'm between month three and four and hoping they continue developing at a reasonable pace. I'm super thin so I just worry that I get enough food to support their growth. That and those glands had better form properly and not give me "toobie boobies!!" They aren't big enough yet for people to really notice with a shirt on (that means my size women's small hollister tshirt) or at least no one has mentioned it yet. I check in the mirror every day primarily because of my fear of being hypoplastic. I've also had very little of the soreness everyone describes. Only a couple times I got bumped it hurt and kinda surprised me in the moment but not nearly to the point of tears. That actually worries me because I'd better be developing dammit!!