Former WWE Diva Tammy Sytch -- who wrestled under the name Sunny -- was arrested in Connecticut yesterday ... her FOURTH arrest in FOUR WEEKS.

TMZ has learned ... Sytch was busted in Branford, CT after an alleged domestic dispute with her ex-boyfriend. Cops determined Tammy had violated a restraining order he had against her. 

Sytch was arrested on charges of violating a protective order, disorderly conduct and criminal mischief.

Law enforcement sources tell us ... Sytch -- who has struggled with substance abuse in the past -- appeared to be intoxicated during the arrest.

Sytch is currently being held on a 25k bond and will be arraigned this morning.

We broke the story ... Sytch was popped 3 times in 3 days back in September ... each arrest for "crimes related to domestic violence."