No insurance, lost home last year, sore lump in armpit, scared

I am 51 and what I tell my friends, a typical statistic, however I remain happy and optimsitic about life. Last year after 15 years in my home, and 20 years providing child day care for 14 children I had to file for bankruptcy, lost my home, moved to a rented house and the first night my college aged son, Dale woke my as the house was filled with smoke. Almost losing our lives we moved to a town home, I reduced to day care to 8, kept a helper, while looking for work, now have lost most of my children. Have had a temp job at CSUFresno, revising, researching and updating a carrer planning guide. Apply for a job or more a day. Nothing so far. 30+ years work experience, will take any job to keep a roof over our head. A days ago I noticed a lump in my armpit. It is sore. I have felt it for three days now and am scared. I called the Free Mamogram line and left a message. Have not told anyone, keeping it to myself. Not sure what I will do. Hope that there is some way I can have know what it is. Only know that in about 1983 I was a medical assistant and a 26 year old patient that I liked so very much (actually we care for the entire family) came into the office with the same complaint. She had a husband and two year old son. She was gone in 6 months. I am scared. Wanted to share a photo but it was too big and I could not figure out how to resize it.

Jamey
Fresno, CA