The more you question 'is this real' it's like falling further down a rabbit hole. You have to re-engage your self with reality imo. I would practice 'grounding' techniques that help reorient you to present moment. Hold some ice cubes in your hand, when taking a shower focus on the water hitting your face, smell something nice that you like the scent of. I guess things like that. I've been told it helps to do those kinds of things!