What is causing my brain to fog over?

Only 28 years old and forget things easy. When someone is talking to me it takes my brain a while to process what they are saying. When I am talking my words come out scrambled and look like an idiot for stuttering and it’s hard for me to tell people what I am thinking into words. Just awkward for me.

I have had a couple seizures in the past, and have lupus. Taking a lot of meds for that and for mental health. Could any of these meds Or conditions be the reason for This? Thanks :) and reply’s would be helpful