Traveling wrote: <<  Had a mammogram just 2 weeks prior to the start
of the problem.(no Problem found)  >>

Yikes...um, 9 months before I was dx'd I had a 'normal' mammogram.  Within days
(wk?) I noted a hardened area, almost above my breast--or at least high up on
it, towards the center.  I thought it was a bruise or tissue damage caused by
the compression of that 'normal' mammogram.  I showed my ob-gyn who flippantly
reminded me that my mammogram had been normal.  I felt embarrassed for even
showing him  9 months later I woke in the middle of the night (wee hours of my
50th b'day) to a severe burning pain.  2 days later it ached--sort of reminded
me of a mastitis infection I had 15 yrs earlier while nursing my youngest
child. 10 days later I noticed a change in my nipple--on a Wed nt. and I was
leaving to go out-of-town to a work related conference at 5:00 a.m.  I was not
able to get to a dr. until Monday--5 days later.  Between the time I first
noted the change in nipple and saw the dr. (5 days), the nipple was changing
daily.
I had a new mammo the next Monday and had a core biopsy that day.  The area
that was biopsied was that same hardened area that I noticed within days after
the mammogram.  Before the results were in the surgeon was talking like it was
malignant (biopsy rept said highly suspicious of malignancy).  
I was dx'd with stage II breast cancer.  3 weeks later I had a bilateral
mastectomy (bad family hx and type that was most likely to recur on other
side).  It turned out that I had 3 different types of aggressive breast cancer
going on and later was re-staged (to stage III) although am not sure it wasn't
stage IV...I had 9 of 12 lymph nodes and extensive lymphovascular invasion.
I don't mean to scare you--each of us is different--but if you noted a change
soon after a mammogram and it persists, I would get it checked out.  I had the
type of cancer that doesn't show up on mammograms until it is advanced.  I had
many normal mammos before that--was getting them almost yearly for the past
several years.  The mammogram didn't cause the cancer--but if there is  a large
enough cancer there it does have the propensity to result in changing the
area/mass to something one can then feel.
From what you describe, I think it woud be a good idea to get a 2nd opinion
from a good breast surgeon.  Perhaps an ultrasound or MRI or ? may be needed.