Today I pulled in to my garage like I normally do, took the key out of the ignition and then, the alarm light came on(steady light, not flashing like it would if the alarm was activated)! I don't know what to do

I tried turning the car back on : the light went off but, when I took the key out it came back on

I pressed the valet button under the dash: nothing

I activated and deactivated the alarm: the doors locked and interior lights went off (except for the car alarm light) but the head lights didn't flash like normal nor did it beep twice like normal

Will this kill my battery? Does anyone know how to fix this ? This is crazy I never use my keyless entry