Did I experience depersonalization? Or is it something else?

The following experience happened to me twice in the last month.

I fall asleep at my typical time and wake up an hour or two later with the distinct feeling that something is just wrong. I feel anxious but not so much so that I'm having heart palpitations or anything. I just have an inner feeling that something is wrong with me. I then get up and go to the bathroom because I find it impossible to lay in bed and attempt to go back to sleep. The first time it happened I instantly started to get dressed and fully intended to go to the ER... my wife asked me what I was doing and I said "I'm going to the hospital. Something is wrong."

She asked what was wrong and I couldn't answer her. That's when I realized I probably wasn't in any physical danger, I or was just having an anxiety attack. So I just went outside and got some air and it passed.

The second time it happened was two nights ago and I just went to the bathroom and it passed.

Here's where I'm confused. I looked up the symptoms of anxiety and panic attacks and I didn't really have any of the most common physical symptoms other than the feeling of anxiety itself. But I also had the weirdest feeling that I was bigger than my body or something. Or like I was hyper aware of my body. It's really hard to explain... but it was very scary. Does this sound like depersonalization?