the heightened smell im not sure but the trance thing, the first thing to pop in my mind is mini seizures, how long are the trances?

This absolutely sounds, to me, like a seizure. My daughter has epilepsy and presents with many different types of seizures from absent seizures to Grand Mal seizures. Absent seizures or petite seizures can look like a trance. I would definitely see a neurologist that specializes in seizures. Please don’t wait.

The trance thing sounds like possibly disociation, I struggle with it a lot when my anxiety and PTSD are getting bad again.

I noticed that my sense of smell has heightened since I’ve been medicated for ADHD; it’s like my autistic sensory sensitivities are on full blast if I’m taking a stimulant. It could also be an increase in stress that causes your body to go into hypervigilant mode. As for the trances, that also sounds to me like something that happens when my ADHD meds wear off. It’s like, as much as I want to move and do something else, I am trapped just staring at the wall or ceiling. It’s a feeling not unlike executive dysfunction, but you may want to seek some sort of testing to see where this is coming from for you.

I would go to a neurologist

Woah this is crazy because I've gotten black outs, a heighten gag reflex, and now I have REALLY bad migraines along with new severe backpain. I'm not pregnant or have any New Conditions. I'm going to see a neurologist to see if there's something wrong. The best thing you can do is check your brain/nerve health.

I get sensitive to smell before and after migraines, and these trances could be quite severe bouts of dissociation

Do you take any prescription medication for the depression and anxiety?