Repeat STEP 1 with your arms raised.
Look for a nipple discharge: blood stained, yellow, white or clear.
Lie down on your back and with your left arm up behind your head. Take your right hand and palpate your left breast. Use the pads of your fingers only, not the extreme tips. Move around in a circular motion, covering all the area, including up to the collar bone and in your armpit. If you feel a lump, see if it is mobile (moves when you push it) and how it feels.