Need help please!

Asalam alaikum

I am in my late 20s, male. I have been having a lot of mind problems that seem to be very complex. But basically my mind does not function and it has been like this for almost 5 years. What i mean by "it don't function" is I cannot think, concentrate, or use my memory. I have tried so much to get this sorted and had a lot of advice from different professionals including getting checked out for black magic, which turned out clear. So it's definately a psychological issue.

It's kind of ruined my life. I have made plenty of dua to Allah but i still await His mercy.

I haven't got married because of this. Can't work properly, can't enjoy my life, can't even read my salah sometimes. Everyday is a struggle. I can't carry on like this.

I don't know what to do anymore. I feel i have lost my inner strength. Please make dua for me.

Your brother in Islam. imsad