All of it could be from anxiety. I've mysteriously broken out with small rashes a few times. Like you said, it could also be from allergies though. I wouldn't worry about it. If it bothers you, go get a doctors take on it. They'll probably attribute it to allergies, anxiety, sinus infection or some other type of sinus issue. If they give you medicine try it out and see how it helps. If they give you something for anxiety, give it a few weeks to start working. With that being said, you'll feel less anxious but if the symptoms are coming from anxiety it could take weeks to a month or two for them to completely go away. If they give you something for congestion (allergies, sinus problems) you should feel a difference in a couple of days. If it continues to bother you, get an MRI for some piece of mind. I feel so much better after getting one and finding out that everything is fine.