Not taking meds and struggling

I suffer from Borderline Personality Disorder/Dysthymia and I'm 24 weeks along. I stopped taking my meds after a lengthy discussion with my doc and psychiatrist. I'm thankfully not suicidal but I'm dealing with a lot of the other symptoms and I just want to rip my hair out. Has anyone else dealt with 'mind fog'?. Right now it's the thing I'm having the most trouble with. I can't seem to actually do anything because it's like my brain is made of cotton.