A part of my mind is gone after taking an edible

Hi, I could really use some help. I’m in a terrible place and I feel very alone. I wasn’t sure where to post this because I feel like it isn’t a very common problem. I really struggle with anxiety as well but I think this is a separate problem. I’m a 22 year old male and I feel like a part of my mind has disappeared because of an edible I took. It's like a part of my brain has just shut off, or is gone altogether. This is causing me a lot of distress. I’m filled with so much regret over taking this edible. I was absolutely useless the day after I took this edible, and I haven't felt like myself since. Its been three weeks. I don't even know what I can do about it. I’m seeing my psychologist in about a week but my life is falling apart by the day. And it all started with an edible. How can something seemingly so innocent for the most part begin to ruin a persons life. This is becoming unbearable. I can't make the simplest decisions, I can't hold a conversation, it's like I lost any creativity and passion that I had before, I feel like I'm in a bad dream and I just have to wake myself up. It's getting to the point where I can't even make sense of anything. The world is becoming a terrifying place. I'm stuck in my ######6 head. I can't see the world as it is. It doesn't even feel like I have a personality anymore. It’s not even like I smoked weed or took edibles with any regularity before this. I’ve smoked weed maybe 5 times and have taken three edibles and none of them had the affect that this latest edible did. The things in life that I was starting to get excited about has lost any of its appeal. There are still moments of happiness in my life but no joy whatsoever. I'm so scared that I've lost who I am. My life is falling apart because of a stupid edible.
Any advice would be greatly appreciated. Thank you.