Typically an actual blanket,many at home, I have one at my friend's place I have my own at my bros, I have a favorite blanket at my mums. When in hospital I wrap myself in the first blanket I can and refuse to let go of it until discharge (sometimes I take it with me if it's been through intense stuff with me) and situations where blankets are deemed unacceptable I wear a massive hoodie. I also have a lucky dice, there's a particular keyring on my keys, a hair elastic round my wrist, and a few other charms and crystals stashed everywhere. I'm a superstitious mess with anxiety basically