The rape allegation leveled against Backstreet Boys singer Nick Carter earlier this year has now hit the desk of the L.A. County D.A. … and they’re considering whether to file charges.

Law enforcement sources tell us the case was submitted to the D.A.’s office just last week … nearly 7 months after the woman filed a report with cops.

TMZ broke the story — Nick was accused of raping Dream singer Melissa Schuman in 2002 — she filed a report with the cops for that incident in February.

In a blog post, the woman claims Nick forced her into a bathroom and forced oral sex on her … then made her reciprocate. She says Carter then took her to a bedroom and forced intercourse.