I used my car and everything was fine, then I went inside my house for 2 hours came back outside. The remote on my keys wouldn't open the car, so then i opened up the car with my key and put the keys in ignition, then the alarm started to go off but it was silent. I only heard small knocks going at the same pace as the alarm would and the pass lock icon thing was flashing on my car. I tried jumpstarting it but, that didn't work either? what do i do?