Talk to others about how you are feeling. The people around you may have similar feelings and they will be able to reassure you. Make sure you have a trusted friend or family member who you can go to if you feel anxious.
Take a break
You might feel as if everything is getting on top of you and anxiety is preventing you from being productive. When this happens, do something to take your mind off it and minimise anxious thoughts. You might want to go for a run, do some gardening, listen to music, play a game or whatever it takes to calm your mind.