How much ram is being used?

So I moved those text strings to progmem and got them successfully in and only 'lost' a few bytes of RAM in the process.. but they no longer cause me to crash.
Are these functions considered nested?
if (xx==yy)
{
}
else if (xy==ya)
{
}
or only those that are like this?
if (xx==yy)
{
if (xy==ya)
{
}
}