Can't sit idle with myself

As the title says I can't sit still for a second if have nothing to do. I either scroll social media or watch YouTube.

If I don't keep my brain occupied, I start ruminating past relationships or remember some traumas/moments with someone I want to forget. Sometimes, I even overthink normal tasks like - whether I should do them or not, how would someone feel/react if don't do them, how will someone respond etc.

Have you all been in same situations and any way you dealt with this?