Girl, you are not crazy. Time is a thing of mystery, like they say it drags when you are bored and speeds when you have fun. Time is an individual experience. You can also lose the time between now and an unpleasant time in the past (actually it can happen with a pleasant time as well, we are just not so bothered by it). This is a flashback. It effectively puts you in the past and you relive the past in the present, so the past is as clear and real as the present.

It's not going crazy, it's actually something that seems to be programmed into our heads, the stress sort of overrides the superficial sense of time we have.

Since I don't have trauma I don't really know how to handle this, my flashbacks are neutral. But if I feel weird having one (even positive and neutral ones can feel bad in that I feel sort of crazy and lost), I catch an object I didn't own back then or listen to some new music that hadn't been released in the past. I have NO IDEA if that stuff works for trauma induced flashbacks, and this sounds more like a cheap trick for lesser stuff but who knows?

Something I also do and I have no idea if it is bad or good, is that I speak to one of my plush toys. I let myself be my miserable self and the plush toy is the voice of reason so to speak (and yea all my plushies have names, voices and personalities...). I think this works for me because deep down I have this odd belief things are somehow a bit alive.

I'm a bit nuts but... anyway I wish you well. You seem to be a good person.