Hello, as you have described the problem for last 7 days. It could be due to various reasons like sudden increase in work load, any new stress, sleep disturbances or use of substance.
Next Steps
maintain your daily routine like sleeping habit, do not skip your meals, start anytype of exercise for about 30 minutes. Also spent sometime with friends or on your hobby. Avoid alcohol or other substance use as it can further increase your problem
Still your problem continue for longer duration like about 3-4 weeks, consult a Psychiatrist. It could be anxiety disorder and require proper treatment.
thanks