Welcome, TXMom.
If you can afford it, I recommend having your child tested again using a different test and tester. I had my dd tested at 4 years old by a diagnostician. The test results indicated that my dd was just within the gifted range. My gut told me that the results were not totally accurate. A year later I had my dd tested by a Ph.d. psychologist using a different test. This test showed that she was in the PG range. I'm not sure why the huge discrepency but sometimes it can come down to have a bad test day or a bad rapport with the tester.
