Oh, you know what else can be good for too many overwhelming emotions? Active release. Don't know if you watched Grey's Anatomy, but one of the doctors there, Christina, has a way of dealing with emotions: "dance it out". She'd put on a headset, or turn on a stereo let her body follow the music and dance, flail her arms, jump up and down (on a bed even sometimes). It's not graceful, or purposeful, but she does it with a complete abandon.

Like grounding, it will not make the emotions disappear, but it may help with that feeling that it's too much, that you are about to explode, or implode.