Sri Sri Ravi Shankar:
Now, there is a problem. You chase them and they come to you multiplied. Just give them a tight hug and you will suddenly find they have disappeared. They are scared of your hug, but they are fond of you chasing them. So, they come back again for you to chase them again, again and again.
If too many negative thoughts are coming, reason is lack of circulation in you. Do a lot of exercises. I think you have too much free time to sit and think. If you keep yourself busy, less of negative thoughts will come. If you are constipated, for sure you will have negative thoughts. So, set your bowel movements correct. That will also help you. If vatta, pitta or kapha imbalance comes, then also you will have too many negative thoughts. Ayurveda herbs will help for that. You can take 2-3 triphla tablets in night, and something to soothe your nervous system, like shatavari. These herbs calms and soothes the system.
The company you are in can also affect the mind. Company of people who are negative, can also affect the mind.
One last thing that affect is time. Certain times, certain planetary positions and certain cosmic energies can all affect your mind. But all this will pass. Don’t be paranoid about anything. Just know that time moves on.