Let them help
The telling has happened. This chapter is what comes after, and it's the part people who carry things alone are worst at, because it's the part where help arrives and has to be accepted.
Accept the specific thing. If you asked them to come on Thursday and they said yes, let them come. Don't text on Wednesday to say you'll be fine on your own. Zhao and Epley's finding is that the helper feels good about helping, and the person who withdraws the request after making it takes that away from them and puts the worry back where it was.
Take the help they offer, even if it's not what you'd have asked for. The friend who can't come on Thursday but offers to cook on Friday is offering what they've got. Say yes. Help doesn't have to be the exact shape of the need to do the job, which was never the scan. It was the company.
Let them ring. A listener who's been told will want to know how Thursday went. Let them. Tell them. That's the follow-up, and it's the difference between one telling and a telling that became a relationship in which the thing can be mentioned. It's also the thing that stops the worry going back into the drawer, because now someone will ask.
Tell the co-owner, if you told a friend first. If the worry has a co-owner and you started with a friend because it was easier, the co-owner is the next conversation, and soon. The friend can help you plan it. A friend who knows and a partner who doesn't is a stable arrangement for about a week.
Take the professional step, if there is one. If the listener says "you need to ring the bank" or "you need to see the GP about that", and they're right, do it this week, and tell them you've done it. The listener's most useful act is often to say the obvious thing you couldn't say to yourself, and their second most useful act is to ask whether you did it.
What help isn't. It isn't the listener fixing the thing. It isn't them carrying it instead of you. It isn't a daily check-in about the same worry, which is the venting from chapter 12 by another route. Help is a second person on the track for as long as it takes to put edges on the thing and take the next step. After that, the thing is yours again, smaller, and you know who to tell when the next one comes.