21 Year Old Suffering from Intense Anxiety for Two Months from Alcohol

Hi guys, I’m looking for a bit of reassurance here. Two months ago (22nd October) I was at my cousin’s wedding and drank too much (Glass of prosecco, 5-6 pints of beer, 3-4 vodka mixes and 2 shots). I don’t drink often and I usually start to feel tipsy after 2-3 drinks. I remember pretty much everything from the night, but after getting sick I passed out for a couple of hours. This was the first time I’ve blacked out from alcohol, and a couple of days later I started panicking and not being able to sleep. I thought I had given myself brain damage from drinking too much or had hit my head and got a concussion.

This was all I could think about for the following week and I was constantly feeling dizzy, slow and had clammy hands and feet, overthinking everything (I couldn’t shut off my mind). A week later I went to the hospital to get bloods and got a CT scan which came back clear. After that, I got an MRI which also came back clear. However, I’m still constantly worrying that there’s something wrong with me and comparing my symptoms to brain damage / concussion, although everyone including doctors have told me that it’s most likely just anxiety. I still have constantly clammy hands and feet, insomnia (can’t shut off my mind), waking up in the middle of the night with panic attacks thinking I’m crippled, unable to trust my mind, feeling dissociated from reality, headaches, overthinking. It’s made me really depressed and I feel hopeless, unable to relax. I keep thinking that my kidneys are more sensitive than other people, so this could have caused my BAC levels to increase more than it should. So, what do you guys think? Am I overthinking it all?