Onc found a lump at 3 month check up, biopsy tomor

[Lauriemn]

Well, I finished my year of Herceptin 3 months ago and was getting ready to have my recon in two weeks, when my onc found a small lump right under my mast scar.
I am so afraid that it was the herceptin that kept the cancer at bay, and that quickly, it has come back.
I go for my biopsy this morning.
Has anyone else had a lump by their scar that turned out to be nothing?
also wondering what treatment people had for a chest wall recurrance, in case this is what it turns out to be.

Thanks,
Laurie