Last pregnancy I got my "maternity" wear mostly from Autograph. Thankfully the fashion was very maternity like, so I would just grab a size bigger and look for stretchy clothes. I did pick up the odd item from Target that was an 18 and a few left over from last pregnancy. I found most actual maternity wear only did me for the first part of my pregnancy. I did get some work outfits online, but I found the quality awful for the price along with the style, they did not get worn second time around.

For jeans, definitely Autograph and look for the ones with extra stretch. Grab a belly band, I think ebay may have some larger size ones, for the last month or so.