All I ever do is think negative thoughts. I am 31 and spend so much time regretting my life. Wishing I had started having kids sooner. Regretting not going back to school. Feeling useless and like I’m good at nothing. Regretting my marriage. It feels absolutely impossible to think a positive thoughts. Is this what depression feels like? I need help but have failed all medications (SSRIs). This is a miserable existence.