Been dizzy a lot with tingling in legs & arms. Someone said it could be a growth spurt. Is that possible especially since I'm just a few years from 40?

No, that would not. be a growth spurt. First of all, those are not the signs of a growth spurt and as you said, you are 38 years old....unfortunately, no more growth spurts at that age. I would recommend that you see your doctor and be examined to make sure this isn't a neurological or other physical abnormality.