Welcome to HCM.
test was within normal limits, there is not much to worry.
It is however better to get a mammography
done to rule out any mass lesion in the breast.
If there is reddish discharge from the nipple then you should immediately consult your doctor.
As long as there is no local pain or change in colour of the discharge or palpable mass in the breast, you need not worry.
Wish you all the best.