yeah i wouldn't worry about it. i used to sleepwalk and have conversations when i was under 5 years old and about 3 years ago i would answer phone calls and make plans with my sister and not remember doing it at all. i'd have to check my phone to see if she was just screwing with me or not, but i'd see a 10 minute call log.

just be aware of sleeping pills, as some of them have the side effect of walking/driving/sex/etc. in your sleep, so they could make the problem worse.