After learning that her daughter Lindsay Lohan was treated for dehydration and exhaustion, mom Dina is relieved that the Liz & Dick actress is ok.

Dina tells X17online exclusively:

    "Lindsay's ok. She worked until 6:15am and wrapped, then went home to sleep. She's working so hard and just wants it to be perfect."

Online reports claimed that the 25-year-old actress was rushed to the hospital after being found unconscious at the Ritz in Marina del Rey. Turns out the starlet was just a bit overworked.

Since production began last month, Lindsay has been undergoing intense filming for the Lifetime flick ... including a fight scene with her co-star Grant Bowler. Of course, she's still not out of the woods in regards to her car accident with an 18-wheeler.

Get some rest, Linds!