Painful right breast-family history so v worried

Afternoon everyone

I have a sore right breast,the only way I can explain it is it feels heavier than normal and it's like a burning dull pain constantly there and sometimes sharp shooting type pain behind my nipple,the crease on my arm pit is tender too and feels swollen .There are no obvious lumps though.If I bend over to pick something up the pain gets worse and feels as though my boob is being dragged down.My mum,my auntie,my mums auntie and my mums cousin have all previously been diagnosed with breast cancer so obviously I am worried.I should probably add I am almost 39,my mum was diagnosed after her very first mammogram(no symptoms)and my auntie was around 54(she had painful breasts so went to gp)(I am not sure of the ages or symptoms of the others)I have a doctors appointment tomorrow so will see how that goes.I am not actually sure why I have posted but I needed to speak somewhere ‍♀️