Time always gives you the answer. Take some time to lessen your workload but still keep up on things but take out some extracurricular activities and refrain from going out at night. Slow the pace, put yourself in a calm environment and take some time out to relax. If your still feeling like this in 4-5 days then cut back on your activities. If you start to slide then its time to re-evaluate your situation. Anxiety can manifest itself, but you'll know better the situation if you lessen your anxiety.