Lili Reinhart’s keeping it real … revealing she was finally told she has endometriosis after undergoing surgery — a hard-won answer that came only after years of doctors brushing her off.

In an IG post Thursday, the actress shared pics from the hospital after her laparoscopic surgery … explaining she’d seen multiple urologists, gynecologists, and hit up three hospitals, yet not one doctor brought up endometriosis. Instead, she was told last year she had interstitial cystitis — and there was no cure.

It wasn’t until she saw two different pelvic floor therapists that endometriosis was even floated as a possible cause of her pain — which pushed her to demand an MRI — finally leading to the real diagnosis.

She says she’s just glad she listened to her gut … adding with endometriosis, there’s usually a massive 4–11 year gap between symptoms and actually getting a surgical diagnosis. Wild.