Do you get to see an example of floral arrangements beforehand?

Hello all. I am getting my flowers done by HEB blooms. I am getting married in about two months, on April 18th. I had an initial planning meeting with the florist awhile back where I described what I want. I am wondering, do florists usually provide an example of what the flowers will look like so you can decide if you want to make changes? I don't want the first time I see the centerpieces to be the day of my wedding, because if it's not really what I wanted then there will be no chance to change it. The florist didn't mention anything about doing a test or trial, so I don't know if I am being silly and stressing out about unnecessary things. Is this something a florist typically does?