Khloe Kardashian was tested for sexually transmitted diseases several months ago after learning that husband Lamar Odom had cheated on her with five women, Breaking Celebrity News is exclusively reporting.

The reality starlet "was physically sick to her stomach when Lamar admitted that not only had he cheated on her, but didn't use protection 100 percent of the time," a source told Breaking Celebrity News exclusively. "Lamar refused to admit to how many women it was, but Khloe knew it was at least five different women in the past year.

"Khloe knew she had to go to the doctor, and was tested for a full range of sexually transmitted diseases. She is healthy, thankfully, but never thought this would happen to her. It's bad enough that Lamar betrayed their marriage vows, but to place her health in jeopardy is just disgusting."