Can you take USMLE 2 without USMLE 1? That would be new to me.
ANYWAY. Here's my 2 cents. If you fail USMLE it will make you look badly, regardless of your COMLEX scores. Some MD places will not look at you without USMLE scores. Personally, I am a DO. I want there to be recognition that I am a DO and my DO tests are ok. I didn't want to go into a program that did not respect that. Hence, no USMLE for me, and it weeded out 2 programs. Fair enough. I still got several interviews and was fine. Peds is not very competitive, on the grand scheme. If you really have your heart set on a specific MD program and it's not really DO friendly, then you may want to take the USMLE to prove yourself. If you are more like me, don't take it.