Prince Harry is reportedly "worried sick" his upcoming tell-all memoir will lead to a new war with Queen Elizabeth and other Royal Family members. 

A source told Heat magazine that "Meghan is urging him to tell his truth and not hide what really happened, but he's worried sick it will lead to a new war with the royals – one he'll never be able to come back from. He feels caught between a rock and a hard place, which is why he keeps stalling on edits."

"Every passage is being revised again and again. Harry keeps remembering new things he wants to include, and then suddenly panics about toning down certain anecdotes. It's been going on like this for months, and with the print date looming, he has to make a decision to officially put it on hold or pull the trigger and hope for the best," the source added.

Harry's upcoming memoir is being ghostwritten by novelist and journalist J.R. Moehringer, who also had ghostwritten the autobiography of former world No. 1 tennis legend Andre Agassi. Meanwhile, Queen Elizabeth reportedly traveled to Balmoral castle on Saturday to get some R&R after a hectic period for the Royal Family as the publication of Harry's new book is approaching. 

Based on Moehringer's previous writings, Robert Lacey said that the public can expect a "powerful and exploratory book." He added, "On Agassi, he not only demolished Agassi's parenting and upbringing, he had a hard knock at the world of professional tennis. Therefore, one would anticipate the same sort of dual attack in what he writes about Harry and the monarchy."

The book, which Harry has promised will be an "accurate and wholly truthful" account of his life so far, will reportedly be released by the end of this year. However, Penguin Random House released their upcoming books list with no sign of the memoir. 

Harry and Meghan have also been linked in Tom Bower's newly released book as it detailed the couple's last days in the palace before officially stepping down from their senior royal duties. 

The pair may not care about an explosive new book about them as they "just play the victim," a royal expert and author Duncan Larcombe said. He told speaking to OK! magazine, "I'm beginning to think they are almost impervious to criticism. Any criticism and they just play the victim so it's like, 'Oh poor us – these horrible people'."

According to Duncan, Harry's soon-to-be-released memoir could be used to set the record straight and respond to any claims against him and Meghan.

Harry Harry's comments came as new figures reveal that the number of new HIV diagnoses among heterosexuals is higher than for gay and bisexual men in England, a trend occurring for the first time in 10 years. Kevin Winter/Getty Images