XXXTentacion was sent straight to jail Friday morning after prosecutors slapped him with 7 new charges, all felonies, in his 2016 domestic violence case.

The new counts include different degrees of witness tampering and witness harassment. Prosecutors believe he coerced the ex-girlfriend he's accused of beating. He was already facing charges of battery against a pregnant woman and false imprisonment.

As we reported ... X filed a document earlier this month allegedly signed by the woman and stating she no longer wanted him to be prosecuted.

At Friday's hearing in Miami-Dade County, the judge said he had violated his bond from his initial arrest ... so he was immediately sent to jail, and is being held without bail.