Nadia -
I know what you're going thru and it's scary, but it's important to get to a Doctor and get an exam.
I found a large lump in my right breast in March 2006, and in April 2007 I had a ping pong ball sized tumor removed. It was a benign Phyllodes Tumor, which is a fast growing tumor that is considered cancerous whether or not it's malignent. Here's the general breakdown of how the process worked for me:
3/21 - Found tumor
3/22 - Call Dr. for appointment
3/22 - Saw Dr. (lucky they could see me right away). Dr. confirmed the lump was there, referred me for a mammogram. I actually saw the PA not the Dr. She advised that the lump was movable, not fixed, therefore probably not cancerous but a fibroid.
3/29ish - Had the mammogram about a week after initial Dr. appt. Mammo tech freaked the heck out when looking at the films from the mammogram. You could clearly see the tumor, it was a large white spot about the size of a half dollar. Also had an ultrasound. These were sent to Dr. who refered them to a surgeon.
Early April - Saw the surgeon, scheduled surgery for 4/21, exactly month after finding the lump.
4/21 - Outpatient surgery on a Friday, was back to work on Monday.
Early May - Followup and recovery
The absolute worst part is the waiting and not knowing. Go see a Dr., depending on the size of the lump and the mammogram you might not need to do anything else and have nothing to worry about. The surgeon told me if I had waited, because my tumor was fast growing, it would have eventually killed me. Before I was lackidasical about my healthcare, now I take things a lot more seriously. PM me if you have any questions about the procedures or if there's anything I can do.