Friend ignored me and posted photos I took without my permission, idk how to fix the situation without sounding like a jerk

need help with how to deal with a situation with my friend. I have OCD as well as autism so my feelings about this might not be purely influenced by the autism. Anyways, my friend reposted photos I took without my permission. I'm very obsessive about how I take and post photos and if I take a photo I want to be the only one to post it. My friend kept begging me to send her the photos I took and I kept evading it because I was posting them and I didn't want her posting the same ones. I ended up posting one on my story and she screenshotted it and posted it while I slept. I got upset and she told me it wasn't a big deal but for me it is. She won't take down the post and I'm really upset because I wanted that photo to be for me and my account only. I don't know how to deal with it because idk how to being it up without sounding like a total asshole. All I want is for her to take down the post and repost it without my photo