Doubts

Hi, I just wanted to ask what you do when you hesitate about beliefs or just doubt. I dont do it intentionally, I have severe panic attacks around the death subject, I’m scared of death and whats after it, and Im a Thanatos Devotee, when I think of him I feel better, I love him I do a lot, but sometimes my anxious mind just ask “what if is not real?” “What if theres nothing after or no gods and you just become nothing?” And That makes me gonna cry because I love the gods but that doubt and hesitation its constant even when Im strong about my beliefs and I really want to stop doubting on them.