You can order herbs from mountain rose herbs to make pregnancy tea with oat straw, peppermint, red raspberry leaf & nettle leaf... ooor you can buy just the capsules of one particular herb at like a sprouts farmers market
I found them at local natural foods store. The staff were friendly there, but be careful, youll find a lot of unwanted opinions come your way regarding stuff like that...
Most drug stores have them or health food stores.