Should I be concerned

Hi everyone, just wanted to share my story a bit since I'm alone here in the States. 26 F. I did a vacuum-assisted breast biopsy in China in mid Feb to take out a 1cm nodule near nipple, 4 o'clock. It turned out to be a mammary adenosis, benign. They put the needle in from 7 o'clock direction. Recently I discovered a movable lump about 1cm near the location of my previous nodule (like 5 o'clock). I can feel it and the size is definitely bigger than 1cm. If it's something new, the growth speed definitely freaks me out.

I'm going to do my ultrasound at Mount Sinai tomorrow morning but can't stop thinking about the worst scenario...Also, I found that if you need to schedule a biopsy after the ultrasound here, you also need to wait for a while...Waiting definitely kills me too...