A bollywood film, where a girl hallucinates and find herself in a world unknown, like Deserts of Rajasthan, kind of Horror, maybe she is there to fulfill a purpose from previous life, I dont remember. (This is the only detail i remember)
It is a long shot, but maybe?
Other possibility - my result from Google too:
Possibly Arundhati [2009]
starring Anushka Shettty
or maybe its’ 2014 remake in Bengali Arundhati [2014]
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Not Bollywood, but Asian. Same premise.