Kylie Jenner and Tyga -- Back On Again?!

Kylie Jenner wants everyone to relax, cuz things with her and Tyga are just fine ... according to her.

Kylie posted a pic to Snapchat Saturday showing her and who we're guessing is Tyga together on a couch with the caption "everyone needs to chill." We're not sure where the two are, but judging by the ink on his hand ... it's safe to say that's Tyga.

It's unclear if the two are officially back together or just talking things out but you gotta wonder, why so soon?