Yes, sometimes I feel that discomfort the week before my period,but not every month for some reason.
I am no longer going to be wearing underwire bra though,last week when I was testing for Electro magnetic radiation in my house I experienced sharp pains under my breasts,which disappeared when I changed bra to one without wire.
I have heard health warnings before about this but after that experience I am convinced that underwire in bras are a health risk.

You can do a lymph massage on yourself to help drain out any blockages that could be causing the discomfort.
Imagine there is an X drawn on each breast,which divides it into 4 sections,the centre being the nipple.
Starting in the centre massage outwards ,repeat this around 5 times and do this on each section of the x