Lump not showing on ultrasound

Sam • leftist, nonbinary, bisexual, and greyromantic. 🏳️‍🌈🏳️‍⚧️

So, I had core needle biopsies done on two sites on one of my breasts even though they can’t see the palpable masses on the ultrasound (they literally just had me point to one of them and they kind of could almost see the other), but I’ve had two ultrasounds and have three palpable masses, none of which has been truly visible and my doctors aren’t sure why. My period is almost over and none of my developments have gotten better. I’m still seeing swelling, skin discoloration, rash, and aches. Anyone else have palpable masses that weren’t visible on an ultrasound? (Btw I’m too young for a mammogram or MRI)