What does it mean to have a bat circle you a few times?

So I was walking home late at night around 2 am ( i was a little high off marijuana) and when I got about 20 yards away from my house a bat started circling me. My first reaction was wtf this is weird. But then it continued to circle me. Me being high I was scared but didn't panic and keeped walking. nd as soon I reached my driveway it circled one more time and flew off. So now I'm wondering if this means something. BTW the following night I dreamed of the world ending. Any help would b appreciated.