Jenelle Evans: Mystery Illness Could Force Me Off 'Teen Mom 2'

"Teen Mom 2" star Jenelle Evans is desperate to find out why she keeps landing in the hospital ... and she's flown cross-country to figure out what's wrong with her.

We got Jenelle right after she arrived at LAX. She told us she's meeting with specialists to figure out why she's having joint pains and severe hot flashes at just 24 years old.

We asked if she'd been stressed while shooting a new season of 'Teen Mom' and Jenelle's response is interesting. At this point, there's no guarantee she'll stay on the show.