When you say you are having anxiety does it mean that you are suffering from disordered anxiety, or you are just feeling anxious? If you aren’t sure, go talk to someone trained in identifying which it is (like your counseling center). It will help regardless. But if you are just feeling a little anxious about recommendations (maybe the fact they haven’t been submitted? I’ve been there—it’s horrible), find ways to distract yourself, and don’t worry about being annoying in reminding them that this is something you requested. I send a “tickle” email once a week or so and every day close to the deadline if I’ve given them enough time.