What would be helpful when stress no sleep for several nights and signs of anxiety are present - situational stress, feel a little panicky as well.

Depends. On whether the stress is impossible to relieve. You may be surprised to know that poor diet can increase your reaction to stress. Get rid of sugar in all its forms and sweeteners befcause that will help.
Self-care/relaxation. When looking at the situation, identify what you can/cannot control. Cope with what you can control and let go of what you can't. Maintain your daily routine or adjust your routine to the circumstances, exercise, diet, relaxation, sleep hygiene, removing yourself from a stress-provoking situation to recharge (even if for 5 min) . Good luck!