I think my Leopard Gecko is dying

[woeful spindle]

you need a vet. we cannot give medical advice on this server, nor can we diagnose

!vet

[plush cliff]

Vets in U.S., Canada, U.K.: https://reptifiles.com/reptile-vet-directory/
Vets in Germany, Austria, Switzerland, Hungary: https://reptiliendoktor.com/tieraerzte-fuer-reptilien/die-reptiliendoktor-liste/
ABVP Specialists: https://abvp.com/animal-owners/find-an-abvp-specialist/
ASPCA Animal Poison Control: https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants
Pet Poison Helpline (US, Canada & Caribbean): 1-855-764-7661