Hello all! i am a first time poster here so bear with me,

I have a 07 camry, recently i’ve had an issue where my alarm will start going off, normally a couple hours after i get home from work, and while it’s going off i can unlock and lock it. I can hear the distinct “beep beep” of it locking and unlocking and my headlights blink as they normally do, but all while my alarm is going off. It usually takes like five or six times of locking and unlocking before the alarm stops. It happens about once a month. Also something else to note, when the alarm goes off it sounds like something is malfunctioning. When i press the panic button it will go straight into that familiar blaring beeeeep~beeeeep. When it goes off randomly it almost starts off like someone is just laying on the horn and then stutters and jumps into the regular rhythm. Any ideas before i take it to the mechanic??