Worried about breast sensation/pain

Hi, I have always had problem boobs - they get painful especially the right one about 2 weeks before my period.  Normally I start my period and within a few days it eases.  However since 2 weeks before my period I began getting pain and weird sensations in my right breast - sometimes it feels like someones pulling it from inside other times it tingles and sometimes its a shooting pain.  I am now nearly 2 weeks since my period finished and I am still getting it.  I am of course so worried its breast cancer, I cannot feel any lumps and neither can my monthly boob checker - my husband.  I have had a couple of ultrasounds in the past on my breasts and always just get told I have lumpy hormonal breasts.  I am 31 and just getting worried, the last time I saw a breast specialist was in January 2016 so nearly 2 years ago and they didn't do a scan.  Does anyone else experience this?  The sensations are weird like a pulling/tingling and when I get a pain it is usually quick and these always happen just in the right one.

Are you sure you are not pregnant?

I have the pulling and pain in my breasts and my sternum area. They did a mammogram and an ultrasound and said I have fatty lumpy breasts as well. I still worry because breast cancer runs in the family. My sternum is extremely sore and so is the cartilage around it.