Scott Begs Kourtney To Take Him Back In Frantic Rehab Phone Call

Scott Disick is in a world of pain now that he's checked into an L.A.-area rehab — and he's desperate for the help of his estranged ex, Kourtney Kardashian.

"He has been going through withdrawal," an insider tells RadarOnline.com. "It's been really hard on him, and he just needs to know everything is going to be okay and needs assurances."

As a result, the fragile Disick has been reaching out to his baby mama, circumventing strict rehab rules he not have contact with anyone outside of the facility.

"Scott has been calling Kourtney from rehab," reveals the source. "The last time he phoned her, he was really upset and emotional."

During the difficult conversation, Disick, 32, was "begging Kourtney for another chance," says the source. However, "She's not giving him any answers right now."

Kardashian, 36, is well aware that Disick needs time to heal and clear his head, so she told him she wasn't going to answer any more of his phone calls for the time being.

So could Kardashian take a cue from her sister Khloe — who had her divorce from Odom dismissed — and call off their split in light of Disick's attempted recovery?

"There's no chance Kourtney will be with him until she sees continued positive actions from Scott during his recovery," says the source. "He always said one thing and did another before and she fell for it so many times — but not this time."