My heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
is sore pained
chuwl (khool)
to twist or whirl (in a circular or spiral manner), i.e. (specifically) to dance, to writhe in pain (especially of parturition) or fear; figuratively, to wait, to pervert
within
qereb (keh'-reb)
the nearest part, i.e. the center, whether literal, figurative or adverbial (especially with preposition)
me and the terrors
'eymah (ay-maw')
fright; concrete, an idol (as a bugbear) -- dread, fear, horror, idol, terrible, terror.
of death
maveth (maw'-veth)
death (natural or violent); concretely, the dead, their place or state (hades); figuratively, pestilence, ruin -- (be) dead(-ly), death, die(-d).
are fallen
naphal (naw-fal')
to fall, in a great variety of applications (intransitive or causative, literal or figurative)
upon me