FNP to PNP?

This may sound ridiculous I realize, but here we go anyway! I'm an FNP who works in a peds. I foresee myself working with kids. I feel like it would be possible for me to move around jobs in peds (@ this company at least) with my current qualification but at the same time I didn't get hired at a few peds jobs I interviewed with that I wanted, because (I'm assuming) I was a new FNP with some RN peds experience (like 1 private duty case... Ha,so not much!) but otherwise adult (although I worked sickle cell so some were young adult,18-19). Anyway I am trying to decided if I should get a PNP? I don't ever want to be passed up for a job because I'm an FNP plus I'm in my 20s and I'm worried if life takes me out of Oklahoma which is pretty relaxed on specialties (we only have FNP at our university). I will really be in a pickle because I love pediatric specialty/complex/syndromes kind of work. Just cruising some Dallas jobs they say "must be PNP" or even "must be PNP-AC". Anyone known anyone who went from FNP to PNP? I work in peds... What about rotations when legally you can already do the work? I mean I did FNP student rotations at a children's hospital. Ideally I'd like to take a bunch of peds classes and study but continue to work and learn at my peds job with out doing clinical hours for free... At my job... But I think that might be a pipe dream.