What if my purpose in life is to be a nanny?

I wrote an email to my dear friend this morning and there I was typing a sentence that has actually been stuck in my mind for a really long time. What if my life calling is to be a nanny, to influence kids, to leave a significant mark in their lives ? Think about it for a moment. For the last 20 years I would say, I've been surrounded by kids and I played a really big role in their lives. The number I'm talking about is bigger than 10. Which is a lot for someone who hasn't turned 30 yet. And I constantly have these offers to take care of some new kids. And it is no problem for me to find a family who is ready to give me a chance to take care of their kids. This time, road leads to Ireland. I have two lovely families who would be happy to hire me as a nanny. Should I stay or should I go, I ask you. I ask myself. I'm already there. I have always been in my heart somewhere near Ireland, Great Britain, so is this my chance to start a new life?