That’s for starters.
If you’re not feeling bad enough to call the hotline, then I’d suggest being around family / friends until the feelings blow over.
You could also try picking up an easy hobby like some high-rated casual game and sinking time into that.
If the feelings stick around through all that, it could be time to seek medical help.
The cheapest anti-depressant, I find, is a B-complex, since low B-vitamins are tied to depression, and dosing that can make a difference in mood fairly quickly.