My anxiety is so off and on. One minute i'm tackling the world, the next minute i'm get afraid to go out and do the things I love. So to cope with the ups and downs here's a few things that really work for me:
Acceptance - acknowledge, accept and challenge uncomfortable feelings or unwanted thoughts as fighting them will only make your symptoms worse. One day they just won't matter at all.
Reflection - take some time out of your day to look at your anxiety and understand it. I realised it wasn't the big, scary monster I perceived it to be. Writing your feelings, thoughts and experiences during moments of setback can be a real eye opener on how really bad your symptoms are.
Time - devote a portion of your day to both relax and spend time with your anxiety. Listening to calm music, walks and meditation are great ways to do both.
Support - parents, friends, gp, therapy, uni societies, co workers - whatever! - are great ways to move on from your anxious symptoms and help you get back on your feet in the darkest of moments.
Really hope this helps! :))