You could try one of the plastic tables with adjustable legs. I have a friend that is your height, and when she comes here to sew I let her use that table. she went and bought one for her home too. She is just at the level that works for her. she says she is comfortable with the height and she can use her foot control so much better. I bought the folding table because I only use it when some ladies come to sew, that way it isn't up all the time. I got it at Shopko, but I do believe many stores carry them. I also use a doctors stool? No back, just a round cushioned seat that swivels and if needed can roll. It has helped my back.
Good Luck
Suzy