Hey G.,
Could it be thyroid problems?
With my first son, my hair started falling out once I stopped breastfeeding at 5 months, and progressively got worse, it was very scary. So at my annual gynae appt I mentioned this to my doctor and he checked my thyroid gland in my throat and said it felt enlarged, and did some blood tests on me. I had also gained a lot of weight in a short period of time too, so the hair loss plus weight gain set off an alarm bell with my doctor and I'm so glad it did. My test results came back WAY high for TSH (thyroid stimulating hormone), which meant I was severely hypothyroid. Apparently pregnancy can cause temporary, or sometimes permanent thyroid problems in some women, either way you do need to get it treated asap. I just so happened to get the permanent version, but am feeling much better since taking the thyroid medication. Just food for thought?
Since having my second son, he's now 4 months old, I'm losing my hair again since stopping bf'ing, but not nearly as much as before. So hopefully it shouldn't last too much longer. They say any hair loss after 6 months post partum should be checked out.
Hope this helps?