It won’t feel like anything. One minute you will be awake and the next you - just won’t. You won’t know anything til you wake up in the recovery area.
When they take you down, you’ll go into the anaesthetic room. They’ll prep your skin and insert the line into the back of your hand. They anaesthetist will be talking to a member of the theatre team while they set you up. They will chat to you too and probably make a joke about feeling like you’ve had a drink, or ask you to count down from 10. You won’t get past about 7!
You won’t ’drift off’ like going to sleep. It’s more instant.
When you come round you might drift in and out a bit. You might be a bit trembly physically. You might cry a bit or feel emotional. That is all completely normal - I understand it might be uncomfortable for you but be reassured it’s just the anaesthetic after-effects and the nurses have seen it all before.
Good that you’re being done this morning, try and stay distracted with a book or something on your phone. You’ll be fine!