Hello and welcome to HCM. Thank you for your query. No ma am. In no way does this indicate the potential for future breast cancer. So, please rest assured. The most probably scenario here is that he managed to hurt either your chest muscle which spreads over the entire chest or a lymph node which drains into the breasts. I understand that this might result in some discomfort for a while, but nothing more than that. The soreness and pain should subside in a while. Keeping a warm pack on the region or taking a warm bath, should help relieve the pain quicker. No pain killers should be required either. You may also ask your boyfriend to address your needs and take care of you in the meantime, as he is responsible for what you are enduring. Cheers. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you. Best wishes.