My seven year old son has been on singular for over four years. ...

My seven year old son has been on singular for over four years. He talks a lot about death. He constantly cries about his dead grandmother which he never knew. He is a very smart child and lately I have realized that something bothers him. He is starting to cry often and feels very depressed. This is what he says when he cries: “My brain thinks bad thoughts about you, (mom and dad). Mom, I really love you and daddy, but my brain does not listen to me. My brain tells me bad things about you like to get a knife and stub you to death, or get a gun and kill you. Please mom make my brain squish the bad juice away and live only the good thinking on it. I know that you love me but my brain tells me different.” My son is begging for help and every day he tries so hard not to have bad thoughts. He tries to hug us and kiss us a lot, but I see on his little eyes that something is wrong. The first time this thing happened I thought maybe a TV show or something made him think so. I am becoming very worried about him and started research on the computer. I don't know what causes his depression, but I know for a fact that he is depressed. He is our only son and gets all the love and attention. Although he has been on singular for a long time, I have given it to him regularly only the last five months, since his doctor urged me to do so. Before I gave him the singular only when his allergies acted up. When he got better I would completely stop it. I didn't know anything about singular, but I don't like using medicine, and that is the reason I did not use it regularly. My son has other similar behaviors that are out of his character like no desire to raise, get angry, worry that I would die, behavior problems at school, he thinks he is stupid although he is a straight A student, has nightmares, is scared that he would die, can't concentrate, is scared to be by himself etc. It brakes my hart to see my baby being depressed. I will stop the singular to see if he will get better. I pray to God he will. English is my second Language. Sorry for any inconvenience.