Feeling like I'm losing my grip on reality

I feel like nothing is real and too real at the same time. Something just feels off like I’m forgetting something also feels like me on my meds and me off my meds are two different people. Although I’m not really sure who I even am to begin with. I feel like I’ve been living inside of my mind and only feel at peace in my dreams. Just feel the sensation of impending doom all of the time. Last week I had a breakdown. Haven’t had one in awhile but this one was different worse than ever before. It’s just a bit concerning. I feel like my grip on reality is loosening.