Kindly relax yourself.
Some input from your side ---
1. pea size lump in the breast on the left side
2. situated in the 3'0 clock position
4. smooth and firm in feel
5. not mobile
6. can slide fingers over it.
This information points towards a benign pathology - fibroadenoma, but malignancy should be ruled out.
You may not come in the high risk group. Definitely hormone replacement therapy has not put you on increased risk.
Relax and have an appointment with your doctor, have an mammogram done and start doing self breast examination regularly.
Thanks very much for the prompt input. I will keep you posted on the outcome.
you are welcome and do update as and when any progress is made.