Help i think my T is dying?

[smallbike]

So sorry for your loss! I know it’s not much of a consolation, but it sounds like you did everything you could. Such a new-to-you tarantula from a pet store that doesn’t sound like it knew what to do with them, it’s likely related to their poor husbandry - I don’t think any of the newbie mistakes you mentioned (and fixed!) would kill a T that quickly. Best of luck with your next spider! I’ve had my eyes on getting a versicolor for a while myself.