...and you deserve the best.
You're right, stuff happens in life that jams us up, slows us down, and makes it harder for us to be and do what we see as ideal health and happiness. One of the most important things falling under the concept of the contrary complements is the one between fairness and deservingness (I know, that's probably not a word, but it should be).
We are dealt certain cards. It doesn't matter whether you believe in fate, a higher power, or just blind luck of the draw.
Sometimes you're the windshield, sometimes you're the bug. Remember that? Sometimes we get good things we want, and sometimes we don't. Regardless of whether or not you're getting what you're wanting, you always deserve the best. Sometimes you just have to surrender to and accept the cards you're given and then put in the effort you can to get what you want.
Effort. Read: Work Hard. Hard work doesn't always have to be dreadful. Don't make it so.
Choose. Read: Active decision. Don't let life happen to you---create what you want.
As I mentioned before, it's not always easy, but it is simple. Take this example: caring for babies is not easy, but you simply have to meet their needs by feeding, changing, clothing, bathing, and keeping them warm and safe. Figure out what your needs are---what will get you where you want to be. Identifying what actions you need to take, what effort you need to expend to meet your needs and wants is a first step.