dress shopping

The wedding is just over 2 weeks away and I still have to find dresses to wear to the rehearsal dinner and to the wedding. 

Why is it that you can never find anything when you actually have to buy something?

I will find millions of great things if I am just "window" shopping. 

I am hoping to find something similar to these dresses. 

Source: mikarose.com via ae on Pinterest

Source: mikarose.com via ae on Pinterest

I found both of these online, 

but I hate buying dresses without trying them on first. 

And I have kind of waited until the last minute,

so if I do not like them I will not have time to send them back.

Which style do y'all like best?
Any other suggestions will be greatly appreciated!