PedsRNinTX

Hi all, I am a relatively new pediatric nurse. I just have a question about an incident that happened the other night at work. While changing a PICC line dressing on a 1 year old (yes I had help to hold the pt), the line came out maybe 1/2inch. I kept my field sterile and placed a sterile dressing on top, as I did not want to mess with the line further until the dr was notified. (the old dressing at this point had been removed). I notified the charge nurse and a call to the dr. was placed to get a CXR to look at line placement. The ER dr called me (our drs usually aren't in house at night) and told me that the line was "not in the correct placement." I specifically asked her if she recommended using the line, and she told me no. I informed the charge nurse and a call was placed back to the pt's primary dr to let him know. He didn't seem too concerned and told me that I could go ahead and use the line. First off, I felt very uneasy about this due to the fact that the ER dr said do not use the line. I told my charge RN what the dr said and she felt the same way. She told me directly NOT to flush the line or even mess with it. She told me at this point it would be wise to start PIV to give the Vanc until the dr could physically come look at the CXR in the AM. She started the PIV and the dose was given through that. When the dr came in the next morning he was livid. Needless to say, I got a call from my supervisor saying that they had to take the line out because it wasn't flushing or drawing since I didn't flush it on my shift. (I don't know how to feel about that either). She also said that my placing a tegaderm without a biopatch could have potentially infected the site..again I'm not sure but it doesn't sound right to me. My questions are: Was I right in placing the PIV (I went to the charge nurse and this is what I was basically told to do)? It just made me nervous thinking the dr that actually saw the xray told me not to use it. What if the pt had received the Vanc and it infiltrated? Is this something that I could potentially be fired for or would it be more of a "correction" type issue? Would the board of nursing back me on my decision in this case? I am just so scared about all of this. I did what I was told to do and then I got in trouble. I know ultimately it comes down to MY decision, but I took it up the chain of command (the charge nurse didn't call the supervisor at this point to ask her opinion). I just didn't feel quite right going with what the dr told me to do if that makes sense. Thanks for listening and thanks in advance for the advice.