Please let it be nothing...

So the answer to my question of whether parenting gets easier was answered with a screaming NO today. I took Monkey for his two year check armed with questions about reflux, allergies, and ear tubes. All pretty common childhood things (ok, reflux at 2 may not be normal, but easily dealt with). We are talking and our pediatrician casually mentions a murmur when listening to Monkey's heart. The I hear the words "see a cardiologist when he comes to town in two weeks". What?? I am still back on murmur. I think I caught on just as the MAC truck hit me. No more. Please God (I am sorry for all of the terrible things I have said in the last two years), please no more of this. Not Monkey. Our Ped then tells me that he needs a EKG and chest x-ray tomorrow. What?? We came in for a well check, not a day of hell at the local hospital. Did I mention that Monkey has an irrational fear of all health care settings? All he knows is shots (Synagis) and terrible hospital stays for the flu and croup. He falls apart just driving into the parking garage of the hospital. This will not be good. To top it off, his Mama is getting ready to hyperventilate thinking about what could be wrong. The doctor said it could be nothing, but he wanted to check. He also said it could be from the PDA at birth. That confuses me. I thought that closed on its own and was gone. No one has mentioned any murmur to me since he was two weeks old. I know I was distracted with Noah, but I am pretty sure I would have picked up on a heart problem. I am scared! I don't know how to stay strong for him. I can't be sick with fear. I have to put on the happy Mama face so he is not afraid. What if something is wrong? Why do these things keep happening? Please make it all be ok. Dear God, please protect my baby. I am on my knees. Please.