I just called someone during my sleep and have no recollection of it whatsoever?! Sleep disorder?!?

I just called my boyfriend, who lives 10 000 km away from me, twice. We had a small little fight or disagreement over chat before I went to bed, nothing major though. Apparently I called him and didn't say anything and so he hung up. Then I called him again and again, didn't say anything. This is when he suspected that maybe may phone wasn't working and decided to call me back a minute later. This time I woke up, and picked up the phone and spoke to him for quite some time. During the he told me I had called twice previously and was acting strange. I had no idea that I had even been using my phone. THis is scary haha, help, anyone know if this commonly occurs?