If you are feeling more down than usual, don’t enjoy things you normally do, have been feeling particularly anxious or nervous, know that you are not alone.
Try talking to friends or family and make some time for self-care: you will know best what works for you. Go out for a walk or try get yourself a nice meal – there is a lot of evidence for exercise, good nutrition and mindfulness/meditation in improving mental wellbeing.
If these aren’t helping, you could consider professional help. You do not have to fit DSM criteria to be ‘allowed’ to seek help – everyone has the right to some extra support.