I would try Nordstrom. Their customer service is great (especially at Tysons) and you can return anything! It's always a safe bet for me if I'm apprehensive and want to try it out.
The Breastfeeding Center of Greater Washington is fabulous. I was fitted for a bra and they had so many different options to choose from. Of course I had been wearing the wrong size, the LC there checked out my nipples (cannot remember her name ) and discovered I have inverted nipples. I was fitted for supple cups and my innies are now outies. They have all kinds of free classes. LOVE , LOVE , LOVE this place. Right across the street fromthe Foggy Bottom Metro.
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Trousseau in Vienna is fabulous. https://www.trousseaultd.com/