Claudia, since this is on your left side, I'd call the doctor, describe your symptoms, and see if s/he wants to see you; anything on the left side could signal a cardiac issue, so you'd want to get that ruled out.
If you're carrying the Blackberry in your bra, in the left cup, I'd suggest you transfer it to a pocketbook, or at least a front pocket. It could be the cause of the vibrations. For more information, read our post on vibrating breasts. Take care- PJH
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