I am on a fixed budget (especially now that I am on bedrest!) and I bought almost all of my clothes off of e-bay. I bought a bunch of clothes, for practically nothing. They were all mailed to my house. A lot of them were new (NWT=new with tags). I just bought a brand new pair of denim capris for 99 cents. I bought 5 motherhood blouses for work for $6 each. I tried stores like Target and JC Penney, but I cannot do all that walking or standing, and some of the styles that are in the stores are not me, like the gaucho pants. I am skinny and short and they look ridiculus on me! There is also a nice (big) consignment store near my house and I bought some cute cute maternity clothes there, most new with the tags still on them, and I think the most I payed was $7.99.
I used a search on ebay something like "maternity small".
Good luck, I hope you find a lot of cute clothes out there!