Cheers Paul. Cheer up ! You do not have a lump. It s a fine favour. Some muscular or lung cough clot also manifest like this so metimes as seen by us. Would you like to follow how our own patients in India are treated naturally when there is no lump or diagnostic findings and everything else is OK except pain. 1. We advise harmless and effective turmeric milk or water to drink. 1/2 tsp turmeric to a glass of warm milk or water. 2. Water boiled with ginger pieces and holy basil leaves ( if available) and one plack pepper ground, to be poured in glass having 1-2 tsp of honey. Stir well. Sip hot. Optionally add lemon pulp and juice. Above 1 and 2 should not be taken simultaneously. Give gap of 2-3 hrs minimum. Massage deeply at stabbing pain area over the breast. After massage preferably do hot fomentation It will help you much and you will thank HCM platform.