Dissociation without trauma?

I've experienced three disassociative episodes in the past two months but I have no childhood trauma or family issues. The only change in my life that has happened is that I have gone to home schooling and my depression has come back among other disorders bubbling up. They're not triggered by anything in particular, like once I looked in the mirror and I didn't recognize myself so I had a panic attack and didn't feel connected to myself. In a movie theatre I dissociated for no reason. There was another time where I was writing an essay and I dissociated. I don't know the cause of it because I researched it and all it says is that trauma is involved.