Alarm problem...HELP QUICK!!!!

[916EK]

Ok....so yesterday I tried to install my Alpine deck so I did and it didn't work so later on when I press my remote button for my alarm it usually makes a loud sound, but now after I tried to install the deck which I still haven't gotten it to work yet....my alarm noise is hella more quiet than before and when I press the remote it doesn't even open. The remote is fine and so today I was driving my car because I had to....I was driving with my alarm going on the whole time....does anyone know the problem to this? sorry if this doesn't make any sense right now cause I'm hella stressed out right now. But someone please help me out