NICES300

hey guys!

This is started to be yesterday at night time when the factory alarms started make noise. I came outside turned the alarm off and left the car open. In 20 minutes the some thing! Alarm is on at 4 am! Lights are on as well. So i had to disconnect the battery at night and go sleep.
Next morning, airbag light came ONLY when the car is not running. The airbag fuse is ok, i took it out the light comes off put it back the light came back too. After I torned the car off, i guess factory alarm beeper starts beepeng and clicking! Also, cluster lights come on too just for shot time and the gas needle starts moving....
Tonight, i had my hockey game and when i came back on parking lot the Lowbim lights were on/security light was also on...
I didnt do anything this wires at all. there is some aftermarket switch but its off. Looks like aftermacket alarm or something.
So for now i have to diconnect the battery for night.

Any Ideas what is going on?
thats so weird