Stress and anxiety. Reduces immunity?

Do something that engages your mind. Absolutely important. You know why? It keeps your mind off of your depressing thoughts. And gradually, your mind will come out of autopilot. More you bring your mind out of autopilot, lesser it tends to fall back to old ways of thinking. Resolve right now that you will get up every morning and do some physical workout. Doing some physical workout will release feel good endorphins in your brain. Do Anuloma Viloma pranayama at any cost. Learn the right technique. This pranayama has very calming effect on your mind. This pranayama will give maximum benefits when you concentrate your mind while doing it. Don’t listen to music while doing this. Another pranayama that I would like to mention is Kapalbhati. It is a powerful pranayama which shows effects from the day 1 itself. Kumbhaka is another powerful breath retention technique that calms mind to a great extent. Do yourself a favour by learning mindfulness. Do it daily. Try to be with people. Don’t sit secluded. THIS IS IMPORTANT. If you stay alone, talk to someone. It would be even better if you could talk to someone who would understand what you are going through. Instead of taking allopathic antidepressants, use ayurvedic medicines like Ashwagandha. I have found it very effective. Antidepressants do have negative impact on your body. Vitamin C has been found to lower the cortisol levels as well. Cortisol is a major stress hormone produced by adrenal glands. You could find great info about Ashwagandha in the video in the end. Take proper sleep. Sleep deprivation actually makes depression worst. One important tip. Never use your bed to lie down and think. The reason is your mind associates bed with thinking. You must only go to bed when you are really sleepy. If you meditate and do pranayama, it will be easy for you to fall asleep. If possible, start consuming egg yolks. Consuming 3–4 egg yolks daily is perfectly safe for a healthy person. Egg yolks contain vitamin B6 which help the biosynthesis of melatonin (for deeper sleep). Take enough sunlight. Sunlight has the power to dispel negativity. Also, your body synthesises vitamin D using sunlight. Vitamin D is important for the production of hormones that keep you mentally healthy. You must adopt the attitude of gratitude if you are going through depression. It shifts your energy towards positivity. I know it would be difficult in beginning but you have to start. One secret: Mind and breath are connected. If your mind is very agitated, your breath rate will be fast. Now, if you consciously observe your breath you will calm down your mind because this very act slows your breath rate down. It works both ways. If possible, take cold showers. It literally works like a gem! try it and see its powerful anti-depression effect. I feel very calm and less reactive on the days I take cold shower. I have tried it multiple times. It works.

Anxiety does not cause immune system to reduce, what you are currently facing is post-covid anxiety, this can be treated. Consult a Psychiatrist as soon as possible.