IgA deficiancy? or any Ig def?

My IgA has been low probably all my life and I've had pretty much all the organs you can live without taken out (tonsils/adenoids,wisdom teeth, appendix, gallbladder) by the time I was 16. I'm not sure if my other Ig's are low or not. Ii have a severe vitamin D deficiancy which my doctor won't check and see if my levels are okay because its not covered any more! As I've gotten older I feel more sick and sluggish, and my doctor thinks its in my head which is frustrating. Has anyone else gone through this before? What was the outcome?