Re: How to behave at a Designer's (for a Bride)
First off - don't worry so much.
While I'd imagine it varies from designer to designer I would come prepared so that way you aren't wasting your time or their's - have an idea in mind what you want (design styles, colors, price range, neckline, etc.) along with looking at their designs what they show you. If you already know what jewelery you're wearing I'd try it on before so you know what type of neckline you need. I'd also make sure you're wearing the type of bra you'd wear with the blouse and bring your heels (or know the height of the shoes you're wearing) so that they can get accurate measurements. I think most designers will be able to work with you along with infusing their own designs. You can definitely change colors. With pricing they'll tell you the range for what it is, but then if you have a price range you can also say that and they'll tell you what they can do to modify the design to fit in your budget. I think the length of time it would take to make the lengha would vary from designer to designer but I'd say anywhere from 3-6 months depending on the season.
I would go back for 2 alterations shortly before the date (1 and 3-4 weeks before) because some designers purposely don't make the final stitching until closer to the date because your measurements are bound to change or they want to see it on you and some also want to make sure that the fabric dying is done so the colors are fresh and not sitting around for months. I would check-in with the designer though every once in a while to make sure things are going smoothly and make 2 appointments for your actual fitting. Good luck and hope this is helpful...