u/Appropriate-Road5253

I participated in a car crash during the first half of january, I hit my head against a window when the car hit the tree, after that I actually felt normal as much of course as normally you can feel after having a car crash, now 13/14 weeks after that I started having an insomnia, at first I started waking up in the middle of the night but now it got absolutely worst to the point in which I practically can't fall asleep, I will be going to the doctor soon but could anyone tell me could my insomnia magically manifest because of that car crash or that is impossible for it to manifest that late?