Which deity to try and connect with for this?

[Ivy Amethyst]

I can't stop thinking of death. It's plaguing my mind all the time and I keep asking myself questions nothing can answer. Which deity can I ask to help me?

[Lord_of_Nightmares]

Can you be more specific?

You could try Santa Muerte, though she is a "saint" she is actually an Aztec goddess. She is the patron of LGBT, outcasts of society, etc, but she works with every kind of thing and most people have positive results with her since she is all about death and the underworld.

[Siona]

Are there any deities you are already particularly close with? If so, it might actually be a good idea to start there.

If not, Anubis, Osiris, Nebet-het, and Hathor are all (Egyptian) deities that come to mind. (There are many other Egyptian funerary deities, as well.) All deal with death and the underworld, and many have experienced them as particularly gentle deities, which might be good if this is something that is giving you anxiety. Hathor is particularly of note, as she also deals strongly with life, birth, joy, fertility, and so on, in addition to being a funerary deity, so the dual outlook might be helpful.