TMI boob problem and a little worried...

I have a doctor's appointment Monday morning, I just want some advice/opinions...I'm 24w2d, ftm and two weeks ago I noticed a lump on my right breast. Since then it's gotten bigger and this morning it is swollen and a different color than my areola. Has this happened to anyone else? Is it a milk gland or something or should I be worried? It doesn't hurt and it's more squishy than hard. Thanks ladies.