Barbra Streisand is reeling from a devastating AIDS crisis — her only son is infected with the HIV virus and faces an early death, The ENQUIRER has learned exclusively.

Jason Gould, the diva’s 36-year-old son by actor Elliott Gould, has been diagnosed with the virus — and Barbra has vowed to do anything and everything to help him.

The issue that goes on sale Friday reveals how Barbra got the shattering news, why Jason was hospitalized in early February … and much more.