"You're freaking me out, stay away from me' Blac Chyna tells her side-piece, Ferrari

Ferrari is the man Rob Kardashian called out last week for sleeping with Chyna in the bed where their daughter was conceived. Read the full report from TMZ below...

Blac Chyna is beefing up her personal security and got her former side piece banned from her upcoming club appearance ... because his recent actions are scaring her.

Sources close to Chyna tell TMZ ... Ferrari won't be allowed in at the Medusa Restaurant & Lounge in Atlanta Saturday night, where Blac is scheduled to host a party. We're told  Chyna's hired 4 extra bodyguards for the night in case the rapper -- who hails from ATL -- shows up.

Chyna's camp claims Ferrari's been calling and texting her the past week, and demands for him to stop the harassment having been blown off. We're told Chyna believes he's released revenge porn despite a letter warning him not to, and she also fears for her safety because he's acting obsessive and delusional. His interview with TMZ particularly scared her.

The owner of Medusa, Lil Henny, tells us he will honor Chyna's ban request and make sure Ferrari is not allowed on the premises while she's working the joint