Lightheaded/dizzy spells??

Does anyone else get randomly light headed/ feel dizzy?

It has happened to me two times this morning. I was just sitting on the couch and got lightheaded. It only lasted like 30 seconds but my boyfriend mentioned that he could tell something happened because I all of a sudden looked disoriented.

I’m not sure if this is normal/something I should worry about, so I just wanted to see if it has happened to anyone else before possibly calling the doctor about it.