Do everything you can to stay sober today, even if it means posting every five minutes or less. Even if it means trapping yourself in your house until the next day, or taking a really long way home so you don't pass the store you always used to go to.
Do some reading, watch dumb videos, go down the conspiracy rabbit hole (you can eat up hours that way, haha), look at animal pics, anything. As totfit said, exercise can also really help. Walking in the woods if available is a great way to ground yourself. If you're afraid you'll go to the store, leave your wallet and only take your keys.
Glad you posted. Hang in there. You can beat this.