How would you feel if you woke up one morning and your girlfriend was no longer human?

A few weeks ago, I (28m) was hanging out with my girlfriend (27f) in bed. We were cuddled up, and I was just watching T.V. on her laptop. I was looking down at her, and she looked perfectly normal. Just a few minutes later, I looked down at her again, and she wasn't. She was still in the same position, but her body looked... different. The first thing I noticed was that her skin was no longer human-like. It looked more like a mix between lizard and frog skin. It was more texture-y, if that makes sense. In the right spot, where her nipple used to be, there was a small, thin tongue that was sticking out. It was moving back and forth in a slow, in and out motion. I was so fucking confused, and I just sat there in shock for what felt like minutes. When I finally looked closer, I noticed that her body looked more reptilian, almost like a dragon, but not as big. I noticed that her hands weren't hands anymore. The palm of her hand was flat like a lizard's hand, but still rounded. The fingers looked almost like a gecko's fingers. They were long and thin. If I ever saw her fingers that shape before, I can't remember. When I looked at her face, the first thing I noticed was that her nose had disappeared. The skin around where her nose used to be was moving up and down. I imagine it's kind of like how a dog breathes through its mouth, but not as dramatic. The mouth was the same, but her teeth looked more pointed, almost like a snake's teeth. I don't know how long I sat there studying her face for, but I finally worked up the courage to look at her body again. I don't know how I didn't pee myself, but I didn't. When I did, I realized that she wasn't actually changing. I was just looking at her in a different way. The way the shadows were lit, it looked like her body was changing, but the lighting was just doing an excellent job of giving her a reptilian appearance. I sat there for a few minutes studying her face, trying not to look too suspicious or weird. When I was finally satisfied that she was still human, I closed the laptop and turned off the light and went to sleep. I didn't say anything to her about it the next day, or the day after that. I just couldn't believe what I was seeing, so I wanted to make sure it was real. The next night, we were cuddled up and watching T.V. again, and she was still normal looking. Every night after that, we watched T.V. in bed together, and I could always tell when the sun went down and it got dark outside. Whenever it was dark out, she looked like a reptile. Whenever it was light out, she looked 100% human. Am I going crazy? Does she actually look reptilian when it's dark? Has this happened to anyone else before?<br><br>TLDR: My girlfriend looks reptilian when it's dark out