All of them work: "I was on call at the hospital and was awoken at 02:00. After attending to the emergency *I got back to my bed* at 04:00" If it's morning, you're in bed with your partner and she asks "did you get up during the night?", the answer might be "yes, I couldn't sleep so got up, read for a while and then *came back to bed*" Finally, you were disturbed by a noise during the night. The next day, the police call at your house investigating the theft of a car from the street outside. You might say "I heard a noise, got up to see what it was, looked out the window but didn't see anything so *I went back to my bed*"

I was back in my bed. I went back in my bed.

btw, it should be "... I stood up", not "standed" :)