sakit di bawah breast

Is it normal klu sy rase sakit kat bawah breast tu..sangat xselesa..at first sy igt sb sy xtukar bra lagi(bra besi)..sy still pkai bra sblm preggy until 5 month..at one time rase mcm senak n sakit sgt kat bwh breast..n sy tpk nk tkr bra bila mmber ckp kne tukar bra biase..but bila da tkar..i still face the same problem..momies is it normal?