How can I grow back down? Maybe regress a little?

I'm only eighteen, but the past two years have been much more than I can handle. At sixteen I started college (full-time, not post-secondary), was disowned by my biological father (because I wouldn't call him 'dad'), and held two jobs. Being seventeen was a little better, I took a month to clear my head in Santa Monica, California and then quit both my jobs to be a nanny (but still in school *yay!*), and met my wonderful man. However, this year I'm now a nanny for four boys and their divorced father, I have lost my best friend because he is "still attracted to me", I just had to transfer colleges (I'm now attending an online university), and went through a miscarriage. All of this has made me a little crazy and I'm feeling more like 30 than the youthful eighteen year old that I am. Any ideas on how I can return to feeling my age?