Simply forget about your coins. Stop to read any news related and stop to check the price daily or 2-3 times a day. You will have less stress and so less fear of your coins. Do it at least 1 month and you will see. 1 month is nothing in a life. After a month just do your usual stuff once a week, check the rate, read some news, ect, close everything and keep rolling the life.
I did it once and prove it was effective but only for two weeks cause I am still in the midst of curiosity of what is happening. For two weeks I am less stress, and when I get back I am in my neutral emotion and did not think to sell out of panic.