FNP needing a change

Hi there,
I am currently a FNP with 11 years experience(17 as RN). Most of my experience has been in pediatrics with my first 5 years as a RN spent at Childrens' National in DC in Heme/onc/bmt, PICU, NICU and basically anywhere they needed some help. Loved the experience except the crazy hours with rotating for a while. Then I moved back to Cleveland and worked my first NP job in the ED at Metro moving into the Peds clinic after 1 1/2 years or so. Did about 8 years there and enjoyed it somewhat--not sure how I feel about "primary care". Now I have done retail clinics for the last couple of years or so and I think I hate it. The first one I worked at was okay-good money, boring stuff for the most part but scheduling got dicey for me. This particular clinic I am in now is a disaster in my humble opinion but really close to home. I am feeling so bad about this job though that I am re-considering all my career choices.

At this point I am wondering if I should have went the pediatric acute care route or CRNA. I definitely feel that the PICU was the most interesting/challenging position I have ever had. I am considering looking into PICU again and seeing where it takes me. I can only work prn since I have 5 small children so I worry about getting overwhelmed since I can't be there as much as may be needed to gain all the knowledge.

I need advice from nurses on the following:
-is it crazy to want to go back into PICU? Has it been too long?
-what certifications would be best to pursue to get me ready for PICU?
-has anyone worked with an acute care peds NP? If so, any thoughts?

Thanks so much, especially for reading my rant!! I appreciate any advice you may give!