What are some reason for TIME LAPSES? No drugs, drinking, anything.?

Hi guys, have a question for you. For a while now (at least a year) I've been having time lapses or what feels like time lapses. I've never done drugs, don't drink, have never smoked, and aren't on any kind of medication. Sometimes I may just be doing something, working, watching T.V., walking, and I forget how long I've been doing something. For instance, I can be at work at take a bathroom break. I know it only takes about 5 minutes for me to walk to the bathroom, use it, and walk back so I know a lot of time hasn't passed, but it feels like I've been gone for an hour or so. It's like I zone out, but it must only be for a few seconds or something. And sometimes I feel kind of disjointed, like disconnected from reality or something, like my head is spinning. I can't really explain it. It always affects my vision, like I can see but I can't at the same time, it's just funky, but doesn't last very long. Any ideas why this stuff would happen and keep happening? I'm not really worried, but I am curious of what it could be. Like I said, I have never done drugs, don't smoke or drink and am not medicated. Thanks if you have any ideas. =)