Pastor John Piper in This Momentary Marriage: A Parable of Permanence brings up a passage which has given me great comfort concerning these desires.
"For thus says the LORD: "To the eunuchs who keep my Sabbaths, who choose the things that please me and hold fast my covenant, I will give in my house and within my walls a monument and a name better than sons and daughters; I will give them an everlasting name that shall not be cut off." Isaiah 56:4-5
Verses like these help us keep from putting children and marriage on a pedestal as the "end all" in this life. God through Jesus Christ has given those of us who trust in Him for salvation an everlasting name which is far better than sons or daughters. God has called some to be married and others to be single, some to have children and others not, and some to be both married and be mothers/fathers in this life. One calling is not better than another. They are all good because God is good and His plans are perfect.
Piper says, "Someone might ask, wouldn't it be better to have both-the blessings of marriage and the blessings of heaven? There are two answers to that question. One is that you will find out someday, and better to learn it now, that the blessings of being with Christ in heaven are so far superior to the blessings of being married and raising children that asking this question will be like asking, wouldn't it be better to have the ocean and also the thimbleful? But that's not the answer you wanted. So here is another one: Marriage and singleness both present us with unique trials and unique opportunities for our sanctification-our preparation for heaven. There will be unique rewards for each. Which is greater will not depend on whether you were married (and had children I might add) or single, but on how you responded to each." p. 113, This Momentary Marriage
These truths help me keep perspective in this momentary life. I pray that I will respond well to God's calling as a wife, mother, nurse, and chronic pain sufferer (at least for now) in this life to better prepare me for heaven. After all this life and all it's blessings is just a foretaste.