Urgh, I'm feeling I'll today too, crazy headache and paracetamol hasn't touched it. Luckily I'm working from home, I think I feel a lunchtime nap coming on 
Deladion, I had a couple of weddings last time and used a dress company called Hire Expectations, they hire out designer maternity dresses for a fraction of what they cost to buy. You just order online and they send you two sizes, then you send them back after. Could be a good option if you want two dresses to wear once each, they have some lovely ones too.