I’m a fire restoration company owner. I’m sorry about the ptsd. Fires are truly horrible events. Please have a professional restoration company visit your house. It will give you peace of mind. They will review for smoke and soot damage. Then you can at least know if the phantom smells are real. After that I recommend an electrician to review your wiring and smoke alarms. The costs of this will be very minimal. In fact based on your situation, if we serviced your city I would come visit and inspect for free. We’re here to help. Restorers have a big heart because we see tragedy every day. Please feel better <3