Before my daughters birth, i remember being scared, calling my husband (at work) and expressing my fears as we neared the due date. Rather than reassurance, my husbands response was "i've been terrified for weeks". Great!
Seriously though, i try not to fret the small stuff but i do worry if i am making the right decisions. To me the responsibility of raising my daughter far out weighs my after pregnancy body, sleep, or social life. Not to say these are not important - if we don't stay physically and mentally healthy, then we are not doing right by ourselves nor our loved ones. Balance.