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Octomom is chill these days, because she's getting baked goods delivered and getting a little baked herself ... all while she cares for her 14 kids ... sources tell TMZ.

Sources connected to Octo tell us ... Nadya is the proud owner of a medical marijuana card -- we're told for anxiety.  And get this ... she got the card 2 days after leaving rehab for Xanax addiction.

The marijuana she consumes is primarily embedded in cookies and other bakery products.  We're told Nadya ingests the pot both at home and on the road during appearances. 

We're told Octo --who considers herself primarily responsible for the well-being of her kids -- believes the children are NOT at risk even when she's not all there.  And speaking of not there ... we're told Octo does not get high when the nannies are around, meaning she's the only one in the house caring for the kids.

So ... the question.  Can a parent temporarily check out by using pot when they have more than a dozen kids ... or is it NEVER OK?