welcome to Health care magic. 1.Not always but possibilities can not be ruled out with out the ultrasound scan / mammogram. 2.The symptoms you have mentioned are seen in case of inflammatory breast conditions, infective causes ( abscess ). 3.If you have mentioned your age and reproductive status would have been helpful. 4.Presence of inflammation with ductal ectasia, might cause heaviness in the breast. 5.Get the scan done as scheduled and needful treatment - Good luck. Hope it helps you. Wish you a good health. Anything to ask ? do not hesitate. Thank you.