Police banging on my door at 3.30 AM because i left my car door cracked but still locked?

I am on on bail right now for a felony charge (which I am wrongly accused of).2 days ago cops came to my door at 3:30 A.M. pounding on my door). (I had taking my sleeping meds for insomnia so I was ped out and never answered the door). When i woke up I saw a note on the windshield, it was an orange piece of paper called night eyes (it was official) It said that my car door was locked but cracked open (you know like how you can use your hip to close it) then proceeded to tell my that they tried to contact my residence, and that my doors where now successfully closed. MY question is why would a officer beat on my door. I live alone in a nice neighborhood but im still a women who would be scared if I heard pounding at my door that early/late. he left the note in my windshield, wouldn't that be enough. Im just wondering what there motives where. I do know if they lessen, change or add on charges i will be rearrested. so when they came that night could they been there to pick me up and when i didn't answer they umed i knew they where there for me, so they left that note to deter me from believing i would be arrested again the next night and not try to flee, my ex is in jail for felony's that i believe they are trying to charge me with, and the detectives have acted shady in the past. tell my what you think. I appreciate you taking the time to read this. god bless