Nervous system work and symptoms worsening?

Hi all, I'm new to the group!
Wondering if anybody who's tried a nervous system program has experienced something similar and how you went about it.

I'm undiagnosed but pretty convinced I have MCAS. My symptoms seem to be mainly neurological plus a bunch of sensitivites:
- INSOMNIA (this is by far the worst one for me and one that gets impacted by anything I may do).
- Anxiety (mainly triggered by lack of sleep)
- Sensitivities to all suplements
- Food sensitivities
- Itchy skin
- Depression
- Smell, light sensitivities
- Throat tightening (this is new - triggered by the latest flare I'm currently on.
- Hormone dysregulation (heavy periods, terrible PMS...)
And a few others...

I suspect my MCAS was triggered due to mold. My home seems to be the issue despite all the money and inspections and work I have put into it. I'm looking into getting out of it but it won't be an immediate thing.

I've read so much about how important nervous system regulation is to allow a more stable day to day and I've tried that through a few courses but I find that I make progress, I start feeling calm until my symptoms slowly start worsening (mainly insomnia). Now, courses like Primal Trust tell you that things may get worse before they get better but I get so scared and I just stop immediately because I'm not sure if my symptoms are worse because the program is working or because I'm pushing too hard.

Any advice you may have, I'd appreciate it.

Thank you.