J.O.
I'll third Our Childrens House! We go to the one in Coppell and have learned so much and my son is doing great. His sensory issues are more auditory/vestibular but it's a wonderful place.
Also, read The Out-of-Sync Child by Carol Stock Kranowitz. It's a great book that really spells out what you are dealing with and what to do to help. She also has an activity book called The Out-of-Sync Child Has Fun. She breaks down the activities into groups for specific needs. And, it's lots of fun for the kiddos!
Good luck!