I would second what Claudia said. I got my dom from inhousepharmacy too. I had no problems.
I took the dom the entire time I breastfed. The first time I was on it for 8 months before the baby was born and then 18 months while I breastfed. The second time I was on it for 11 months while we waited, and then 20 months that I was breastfeeding. I was able to wean down to a lower dosage, but when I stopped it completely, my supply really dropped (I was ready to wean at that point).
I would order it right away so you can get started. I always ordered the largest amount they offered because it was cheapest per pill.
Jennifer