I know this must be very hard to deal with. How long have you had this odor?? Can you smell it yourself?? does it only happen when anxiety kicks up or do you just notice the odor when you have anxiety?? Do you know if the odor exist before your anxiety and just happen to get worse when you get nervous??
I'm pretty sure that being nervous can defiantly make the odor worse... but i'm not sure if it causes it. It is possible that anxiety has something to do with the odor problem but you need to ask a knowlegable doctor that specialize in that area.