Hi Laura,
Maybe the easiest thing would be to print out all the posts on this thread and show it to your support worker, as you've been saying how you really feel here. I know it's REALLY difficult telling someone what's going on and also not being sure how much to say (to stay in control of the situation?), but it does sound like you need and deserve help.
You could show them your update too "Miss Laura
is feeling really ill and unsure what to do. I want someone to talk to but don't know what to talk about??" It's a starting point for something to talk about!