Really scared about my other breast

Hi all, 37F, + + -, DCIS/IDC in my left breast (lump is 2.3 cm x 1.3 cm x 1 cm) per MRI results last month. Got diagnosed on 10/30 after biopsy.

I have a lumpectomy scheduled for this month, and I'm mainly going with that surgery because it was the only thing I could have done this month. If I wanted a DMX it would have to wait until sometime in January and frankly I'm terrified to wait that long.

My current worry is my right breast. I've been having flashes of pain in it that come and go. My affected breast has been painy too since my mammogram (anyone who says cancer lumps don't hurt can go f themselves). Now, my genetic testing was negative for any BC genes, and the contrast MRI found nothing in the right breast. However during my original mammogram/tomosynthesis back in October they noted something in my right breast ("The right breast is stable with no concerning findings. Benign-appearing asymmetry is noted within the medial aspect of the breast"). Doctors haven't commented on that either. But last year my affected breast also got a "likely benign"/birads 3 rating last year so that isn't terribly comforting to me.

I'm hoping this is psychological somehow. If I don't get clear margins on my lumpectomy I'm going to ask for a DMX. But if my lumpectomy does go well I can still consider a DMX in the future which I think I will. But has anyone had pains like this in the other breast?