I've been convinced, moreso than usual, lately, that basically every car on the road is following and surveiling me. I've started taking various countermeasures.

I was awake, last night, until about 5am. Stayed up for most of the night, waiting to see if there would be more camera flashes and weird lights in the woods in my back yard.

There weren't many, so I figured that they must've picked up on my knowing about them and fallen back to watch more remotely.

My fiance was getting ready for work as I was trying to nap before I needed to be awake (in less than 2 hours).

When I woke up, the whole house smelled like propane. My fiance said that it didn't smell when they left.

Within a 2-hour timeframe, the whole propane tank was emptied and had spread throughout the house. They waited until I wasn't awake and waited for my fiance to leave.

The person who did it knew that I'm a heavy smoker (you can figure that out in under 15 minutes).  I am not sure if this was meant to cause damage or kill me or if it was a threat or a warning or what.

Any thoughts or advice?