TIFU - by getting scammed for almost 2 years

In 2019 I've been in China for my studies, and with some friends we downloaded the app Tan-Tan to date some girls. I talked with some, but one got my attention. With her, I talked about geopolitical and historical things, which was very interesting. But she quickly started talking about sex, and insisted to exchange some photos. That's not something I usually do, so I refused at first. She still sent me some, and even if she didn't show her face on those ones, and the background seemed to match with her Tan-Tan profile. She wasn't talking much about herself though, which I found weird. After some weeks of talking, I decided to finally send her some nudes. Our conversations were very interesting, so I decided to trust her. I proposed multiple times to meet her, but because she couldn't speak English at all, she always refused. In February, I had to come back to my country because of the Covid-19. Despite the distance, we continued talking. Again, we exchanged some nudes. Just to protect myself, I never showed my face on the explicit ones, but she still has some photos with my face on them. We continued talking a lot, and the sex game between us vanished somehow. But three days ago, she came at it again, and sent me a gif, saying that was her, and asking some photos. That's when I discovered everything. On that gif, I found an inscription, which was the name of a Redditor. I looked at that Redditor's profile, and indeed found a video that represents the gif. I began to investigate her WeChat profile, with some reverse photo search, and found out that everything was a lie, from the beginning. She (or he, I'm not even sure now), didn't threatened me with the photo I sent, and now knows that I discovered everything. I reported his/her profile on WeChat, but I fear that my photos may be used elsewhere.

TL;DR : I chatted with a Chinese girl and exchanged nudes for almost 2 years, and I discovered she was a scam only 3 days ago.

PS : If you read everything, thanks to you. It may not be an uncommon story, but writing it here made me feel a bit better. And even if it seems obvious, be very careful with strangers online. I'm not especially young, and I've always been very careful about this, but I still got scammed, so it could happen to others.