Can you recommend a transmigration novel?

The story went like this: The female protagonist traveled back to ancient times and met a child who matured early. At first, the female protagonist didn't know that the child was an adult. He turned into a child because he was poisoned. He seemed to be the leader of a demonic cult. Later on, the female protagonist set off with this child (male protagonist) and his entourage. And every time the female protagonist was in danger, the male protagonist would transform back into an adult to help her out (but the female protagonist didn't know, and the male protagonist's adult form could only be maintained for a while). After a few twists and turns, they found a divine doctor to help the male lead detoxify. Later, the male protagonist changed back to an adult. At first, the female protagonist could not accept it and did not admit that the male protagonist was the original child. She even asked the male protagonist to return him to her. Later, after the male protagonist's explanation, she was relieved... P.S. I remember that one of the plots was that they stayed in someone's house on the way. On a rainy night, the child-like male protagonist disappeared. A big hole was broken in the house he lived in and it was a mess. The female protagonist went to look for him and was in danger in the bamboo forest. The male protagonist helped her out again. The male protagonist's eyes were red from killing. He thought of a demon. It was the female protagonist who pulled the irrational male protagonist back... P.S. This book isn't very popular on the Internet. I saw it on the Internet about one or two years ago! DPS: It has been confirmed that this book is not the following: "My Baby Husband","Rebirth","The Evil Prince Knocks on the Door","Yin Hui" [PPPS: this book is not a fantasy, the male lead is a human!] Moreover, the female and male leads had been staying together during the period when they were poisoned and turned into children. The female protagonist's body directly passed through and passed through the forest to meet the male protagonist (in the form of a child when poisoned). Moreover, he was at most in his twenties ~ Urgent request! Who can help me? I'm eternally grateful!