<p>My newborn son had his 2 day and 2 week screening just come back from the midwife and the pediatrician sent him for more tests for Hyper/Hypo Thyroidism. Is there a Hyper and a Hypo or are they one in the same? What scares me is that he is now 5 weeks old and they are just now getting to this. I've read on line that it can cause mental retardation and other problems if you don't get them on medication. Is it safe for them to have waited this long to deal with it? They are telling me the test results won't be back until Tuesday and Thanksgiving is Thursday so he will have to wait another week for anything to be done. How important is it to get something done now? The only two symptoms that he seems to have is he has the prolonged jaundice (his billirubin is at safe levels, but he hasn't changed much in his yellow color since the last test over a week ago) He is gaining weight and growing, but he does at times seem harder to wake up than what I remember my other two babies. At night especially I have to wake him up to nurse him sometimes, otherwise I think he would sleep throught the night without waking. My other two babies woke up religiously every 2-3 hours all night long. Anyone else had an infant with this, but didn't get treatment for the first month. I am just worried about waiting too long. Thanks for any help.</p>