I Hit My Head On A Pool Table While Blackout

I hit my head on a pool table while blackout drunk in a bar. This was 4-5 days ago. I have been to my local emergency room. I was told I have a mild concussion. Everything is okay, but I get dizzy when I lie down for a few seconds or when I turn my head to the right while lying down. Any other time, I am not dizzy. Is this normal? I have extreme health anxiety and I am constantly worried that I'm dying. I haven't been able to stop worrying since this happened to me. I have swore off alcohol since this happened. Alcohol caused it to happen so now I'm terrified to drink again.