Waiting for IBC results

Hello,

My name is Stephanie and I am 28 years old. I was nursing my 18 month old baby girl when I noticed a bruise like area on my L breast. I waited a week thinking it would get better but it only progressed to become more Inflamed and red vs the light bluish color it was. I made an appt with my Primary Care doctor and voiced my concerns about IBC and my symptoms. She prescribed me an anti fungal cream after a picture was taken and sent to a dermatologist via "telederm" . He said try this cream, hopehopefully this isn't related to breast cancer. They then did an mamagram and ultrasound which came back normal and said "NO lump, No cancer". I didn' agree so pushed more and let them know I needed to KNOW what I have so I can treat it as the creams and antibiotics they were giving me hasn't worked. I am going to be seen tomorrow for a biopsy and am very scared. I don't think the doctors I have seen are knowledgeble about this type of breast cancer and they WONT listen to me, or research anything at all. Any insight or suggestions on what I should do would be greatly appreciated. It has now been 2 months since I first initially noticed this, and has continued to get worse. No pain or itchiness, just red, thick inflamed skin on my breast. Thanks