Extreme fear of plagiarism

A couple of weeks ago I had to do an assignment involving more than one person. And ever since I realized I did a project/assignment wrong and had to do it again and quick as it was a day before thanksgiving break, keep in mind I have no access to the assignment after class I forgot to add the name of one of the people who designed one of the pictures in the project my brain has been spiraling like crazy. All week during thanksgiving break I’ve been thinking about it constantly over and over again. Then after I added the name of the designer and turned it in i remembered that the project will be printed and possibly published online if it’s good enough and the teacher talked about a border that will be around the assignment and to make sure to make the project fit. My brain started tweaking out telling me that the name won’t be there and I’ll be accused of plagiarism. I constantly asked the teacher questions about the assignment throughout the week. After I asked the teacher about the printing she showed me how she’d print it and that she moved the name. But then my brain spiraled out later in another class telling me that what about if she publishes another part of the project online months later, (the one that she chose not to print but can still technically be published online if she thinks it’s good enough). I then asked her about it again. She said she that if anything related to online publishing it’ll will be in months. Then I asked her again when she wasn’t as busy about what if there was a border hypothetically and it covered the name of the person who made the picture, would you edit it and she said yes. Now currently my brain annoyed me once again telling me what if the border is too small for her to notice the name of the creator of the picture being covered by it and she publishes it without double checking and you get in trouble or accused or plagurism. These thoughts feel genuine and that I have to keep asking. I told the teacher about my ocd and constant thoughts and she said I’m allowed to email my instrusive thoughts to her about the assignement even if she may respond late. I wanna do that but if I keep getting reassurance or anything like that it’ll worsen the thoughts. I genuinely don’t know what to do. I’ve talked to my friend who also has ocd about it, he introduced me to this app, I’ve talked to my mom about it, I’ve talked to the teacher about it. These past weeks I’ve been stressed, sleep deprived, I often woke up with my hands shaky, I can’t concentrate on homework, and I keep arguing with these thoughts and losing. Worse of all everytime I’m in the class where I had the project my thoughts are extremely strong. I just want my life back.