life changes

so how is it that two weeks before my 37th birthday i find myself driving up to maine to pick up my father and bring him back to mass. to the er!? i now take care of my dad! when did this happen? i had the same question when i had two kids, "when did i become a mom of kids!?" but that makes more sense though. taking care of a parent at a younger age, yes i still think i'm young although i can't believe i'm closer to 40 now, is just odd to say the least. and there is so much more than that. now i have the kids (five and seven), a husband (thank gawd for him, he's a saint!), and back and forth to the rehab hospital for my dad. thinking about all of their futures too: "am i doing right by my kids?", "am i being a good wife" and now "where is dad going to live, who is going to care for him 24/7".... calgon take me away! and that's on top of the underlying thoughts i have about not going to the gym enough, not doing enough for the kids, my husband.... OY
so my point is, how is it that i still feel like a kid and at times wonder how i got to be living this life? i know it has been in the works for awhile but don't you ever take a step back and think "wow, this is my life and this is what i'm doing and i can't believe it!"?