6 yr old with thyroid problem ?

I need to know if I should take my son to an endocrinologist now or wait 6 months to run more test? My son will turn 7 april 30th. He weighs 56lbs and is 46 in tall. He has been diagnosed with 3 diseases in his left eye. He has been in speech therapy since he was 3 yrs old. Always had allergy symptoms. Had cellulitis 4 times from misquito bites. He is pale, has constipation always, poor diet, complains of neck pain, very tired after little exercise, his hair is like straw. He has enlarged growths in his nose, I have noticed small knots on the base of his head behind his ears, if he gets upset it looks like his neck swells and he can't breath, very emotional at times. About 3 months ago he bagan complaining of back pain ( right above his left hip ). I took him to the dr that afternoon he said his sactum and spine were out of a line and did manipulation. He has been to the dr alot since then; for fluid in his ears, allergy symptoms, and still the back pain, the latest he had a fever for a week. At the last visit on 3-2-09 he decided to do blood work here are the things out of range; bun creatinine ratio 21/ creatinine .48/ potassium 3.1/ lymphocytes 789/ eso 7/ TSH .38 On 3-3-09 dr. called said to push potassium and they were checking his thyroid.On 3-4-09 thyroid test freeT4 was normal and T3 high. Nurse called said the test were confusing and they would see me next week. 3-12-09 dr said the thyroid test were confusing and he would test agian in 6 mos and dr tested his potassium (after I insisted b/c he hadn't had diarrhea or vomiting)He also said he thought he had a bruised floating rib. On 3-13-09 nurse called potassium up at 4.1 blood sugar dropped to 64.( It was 88 on 3-2-09) the test was done at 3:45 he ate a oatmeal cake and propel water at 2:30. He had not had gym before that. Now we are going one month without pushing potassium and retesting the potassium on 4-14-09. I'm very concerned at this point. I appreciate any advice you can offer. Thank You concerned Mom, Dodd404