Worms won't hurt, they may even loosen up that dry, heavy-looking soil. Also, her color says she is hungry.
That soil is too tight. You need to repot with dry soil and keep it loose by adding some perlite, or something to loosen the soil for drainage. Water has to drain through faster than what it is now.
perlite a min of 25% per pot does absolute wonders to any crappy soils worms are best added without the plant tho not much will dis a plant good luck