Hi there
As for your initial Mammogram, I am surprised an ultrasound was not performed at the time, especially since your referral indicated a breast lump and the mammogram findings indicated density. However, this is what the clinic has done so where to from here?
You haven't mentioned whether you can still feel the small lump at the moment or whether it's proven to be more elusive since the initial consultation with your doctor.
If your lump can still be felt, I see no reason why you cannot ask for a second opinion by going back to your doctor and getting a referral to another clinic, however with a specific request for an Ultrasound followup to ensure this procedure is carried out
If, however, it's gone into hiding, this isn't unusual and as already mentioned, is related often to hormonal changes and menstrual cycles.
Sometimes tracking these can bring some peace of mind by keeping a small diary of the dates and times that the lump can be felt, and when it goes into hiding. It wont take long to see a pattern and should help ease any anxiety.
All the best
The description of your breast tissue in the report means that your breasts are essentially normal but the tissue is dense (hard to see through) and this might hide some finding. I do believe that an Ultrasound should have been done and if your family Dr. would order one I see no problem having this additional testing performed. Often one test will "see" something that another one cannot. The fact that no one seems to be able to feel (palpate) this lump except for that one time could be due to it being a small cyst that may have gotten smaller or has moved. This can happen with cysts. Cysts are sometimes related to your menstrual cycle and can vary in size or even seem to disappear completely due to the hormone levels in your body. First I would see your family Dr. again and see if she could order the Ultrasound. I wouldn't worry too much at this point since cysts are harmless and many women have them. A second opinion would be good but I think the Ultrasound is more important to have done first. Regards ....