EVA MENDES’ pregnancy stunned BF RYAN GOSLING, and now he feels trapped, The ENQUIRER has learned.

Sources say the tension between them is threatening their relationship and Eva’s health! The 40-year-old star’s pregnancy “was completely unplanned,” an insider told Radaronline.com.

“Ryan was surprised, especially because they had broken up early last year, only to get back together.” The two began dating while filming “The Place Beyond the Pines” three years ago, but their relationship has been rocky. “Their disagreements always came back to a central issue,” said the source.

“Eva wants to marry Ryan, but so far, he has resisted.” Now the two are clashing over 33-year-old Ryan’s reaction to “The Notebook” director Nick Cassavetes revealing that Ryan feuded with then-girlfriend Rachel McAdams on the set, said the source.

“Ryan called Nick and voiced his displeasure about him talking about his ex-girlfriend,” said the source.

“Rachel is definitely a source of ongoing tension between Ryan and Eva.”

With all the stress, Eva is on bed rest, said an insider. “Eva is constantly tired,” said the source. “All she wants to do is rest, so she’s following her own instincts – as well as expert advice – and spending most of her time in bed, which she intends to do until the baby arrives.”