as others have said, the bloating subsides. I was definitely bigger at around 6-7 weeks than I am now, and seriously considered getting maternity wear then. Now, you can't tell I'm pregnant. Well, I can, DH can, and my mother can, but that's about it. I was a size 8 pre-pregnancy - at 15w, I'm now a 10, and have put on precisely 500g. I went to Monsoon and bought a few clothes in their sale - a couple of smock-type tops, an empire-line dress, and a knitted skirt with an elasticated waist - all in a dress size 1 bigger than usual. I figure they'll be wearable post-pregnancy too. I'm still wearing pre-pg jeans (though I did have a dodgy few days around the 6w mark when I had to undo them by late afternoon!), but I have ordered some maternity jeans. I think I will need them in a couple of weeks' time, but not before.
I have a couple of empire-line and wrap jersey dresses anyway, and they have been perfect, even in size 8 - but I am just starting to grow out of them. I don't have a bump, but my waist has thickened to the point it's vanished. I took a pic a couple of days ago to post elsewhere on here - you'll see what I mean about not looking pg:
If you can find anything left in the sales, you could stock up on a few basics -you may be able to get some of last summer's clothes, for example. I bought a summer dress from JoJoMamanBebe for £10 - by the time I have a proper bump, it'll be summer anyway! But tbh, if there isn't anything left, you'd be best off waiting for a bit, as by the time you actually fit 'real' maternity clothes, chances are it'll be spring/summer (the mat tops all have a 'pouch' which you really need a decent bump to fill, and the dresses are all longer at the front so that the hem is straight when you have a bump). Until then, go for the looser styles like peasant/smock/tunic type tops, or wrap dresses in stretchy jersey material a size bigger than usual, or the wrap tie skirts, if you can find any. Jeans will probably be the first maternity item you really need, since most non-mat jeans are pretty unforgiving. And as others have said, a cheap pair of trackie bottoms for slobbing out at home will do for evenings/weekends.
Oh - and you'll need to sort out your underwear drawer! You will need non-underwired bras soon, for comfort as much as anything else (later so that you don't damage the ligaments or something - there's a medical reason, anyway!!!) - but don't buy too many. Around 10-12 weeks, you'll prob need a different size, and apparently again around 20-24 weeks (so the fitter told me!). And you may want to buy some bikini-style knickers in a size or 2 bigger than usual - I bought some M&S ones in size 12 - because I really couldn't bear elastic round my middle. UTIs are more common in pregnancy, so unless you're a die-hard fan, it's sensible to avoid G-strings/thongs and to go for cotton underwear, or at least cotton gussets.
gosh, this has turned into an epic. Sorry!
. But if you can get away with it just buy bigger clothes unless they are unusually baggy anywhere else 
but iv still got it, and this time it should be perfect for september! 
