Hello, I am Jill Guinn
and
I am all these definitions:
Seamstress: A woman whose occupation is sewing (Webster’s)
Dressmaker: A person who makes custom clothing for women, such as dresses, blouses, and evening gowns. (Wikipedia)
Sewing professional is the most general term for those who make their living by sewing, teaching, writing about sewing, or retailing sewing supplies. She or he may work out of her home, a studio, or retail shop, and may work part-time or full-time. skills, and may only sketch or conceptualize garments. (Wikipedia)
Oklahoma Seamstress 
Hello this is Celia Serrato I wanting to see if maybe you can make me a plus size formal dress and i would need it by November
Good morning, Celia. I am booked through Christmas. However, OKC Fabric Market is a wonderful fabric store. Many dressmakers have left their cards with the shop. Below is a link to their facebook page for OKC Fabric Market.
Best wishes.
https://www.facebook.com/okcFabricMarket/