Hi Mrs. Porter,
I too suffer from OCD and notice it definitely escalates when I am about to start my period or while I'm on it. My heart aches for your daughter and for you having to witness it. With that being said, I have read the vitamin B-12 might, I personally have not tried it with my symptoms, but I have been looking into it. Experts say Kava can help with anxiety also. For me drinking tea helps a lot(honey lavender, occasionally chamomile). Is she currently seeing a therapist that specializes in OCD patients? I would have practice mindfulness and positive reinforcement with her thoughts- meaning "bully" back the nasty OCD voice. When I have an intrusive thought or image, I tell myself "this has nothing to do with my character, this is just a thought and even though I had it, I'm not doing this in real life." Or I'll take the people or animals involved in the thought and make myself imagine a positive scenery instead. It takes me a couple minutes to let the negative thought go, but I try my best to over analyze or find reasoning as to why I had the thought. I also tell myself that "if I have an intrusive thought or image, I won't be afraid or worried" since im a lot more mindful of my OCD. Reactions to the thoughts and images are EVERYTHING, meaning if I become afraid, sad, distressed with the thought, I'm giving the OCD more power than I should. I hope this helps and I wish the best of luck with you and your daughter. Xoxo