Virgin no more....?

So, a couple a week's ago I had sex for the first time...as we were going and he was inside of me...I didn't fell him in me...he said he was in... I started going up and down...I was very wet and very anxious...I actually froze on top of him and had a mini panic attack...so I guess my question is, can you always feel someone inside? Is it just possible I was to nervous that I was not focusing on feeling him? 🤦 Any helpful thoughts?