Do you mean at 7 weeks postpartum you had a mammogram and your daughter is now 4 months old? I'm also confused about why you're concerned. You said you had stopped breast feeding before the mammogram. If that's the case, your daughter was not exposed to your milk after the mammogram.
Mammograms are taken, using a small amount of x-rays. Nothing stays in your milk. We are naturaly exposed to radiation everyday. It's in the air. Food can be irradiated and still be safe. Women have numerous mammograms over a lifetime and remain healthy.
Again, if your daughter did not drink breast milk after the mammogram, why are you concerned? Even if she did, she is OK.
I'm guessing your doctor said you could wean as a choice not as an order.
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