Breast ultrasound during pregnancy

My doc believed I had mastitis early on in pregnancy. Inflamed large right boob, warm to the touch and had a fever. So I went for an ultrasound and they coincidentally found a 7x5mm nodule which they followed up in three months with another ultrasound. That scan was two days ago and the results were the same that the same size nodule is still there but my breast infection has since cleared. Has anyone else found a mass during a scan while pregnant? Hoping it’s just the hormones and nothing more that’s making this thing flare up. I a 27 years old and first pregnancy