You're not alone in feeling this.
PTSD
Source: Mind / published studies
The reality
PTSD is the mind's way of holding onto a frightening or overwhelming experience so it can't be forgotten. It's a survival response that's still switched on.
A word of kindness
Reliving something painful over and over is exhausting and frightening. Your mind is trying to protect you the only way it knows how. Healing is possible.
Something you could try right now
Your reaction is a normal response to an abnormal event. Ground yourself in the present: feel your feet, name out loud where you are. If the past keeps pulling you back, that's exactly what trauma support exists for — you don't have to carry it alone.
Nothing here is a diagnosis or therapy. Figures are indicative population estimates from public health bodies — not advice about you.