Labs, Xrays... My day at the doctor

I had my 4 month check up a little over a week ago and when I was there I had just started sucking my chest in when I breathed. The doctor listened to my chest and said if I wasn't coughing and I was feeling ok, it was probably nothing. Well, I have continued to do that for over a week and I am also congested. Mommy, daddy, nonny, and gram E were concerned about my chest so yesterday, I went to see my Pedi, Dr. Mcnair again. My lungs sounded clear, and Dr. McNair did not really think I was sick, but to put mommy's mind at ease and just to make sure, they checked the pressure in my ears (which was fine), they took blood for a blood count (which showed that I probably have a virus, but they had to stick me twice to get it), they put a pulse oximeter on me to check my oxygen (which was 95%- acceptable), and finally I had a chest Xray (perfectly fine). The doctor said my virus should heal up and my chest sinking in is called a "pectus". She said the cartilage had not gotten firm enough yet and I could do this into toddler hood, but it should strengthen and look normal as I get older. Also, mommy has officially moved her bed out of my room. :( I am on my own!