First and foremost, work on your mindset, start doing away those negative thoughts, start believing in yourself and thinking right. Devil tends to penetrate through our thoughts easily thereby making it look like nothing is working for us,it's a lie...trust me.
I understand perfectly well what you're going through, I've been there before.
Keep on releasing good things your way,keep on praying especially mid night prayers, associate yourself more often with the right ppl, change your reasoning, believe that you 've been set free. Always pray with Romans 8:1-3. Its a thing of the mind n only u can deal with dat demon. Good luck.
PS: remove dat age stuff bla bla,so many ppl at 28 are still looking for admission n no be demon dey do dem.