I'm so sorry Mgran to hear that ppl can just walk up and in to your home...invading and all, that can't help with any thing. I agree with Shayatanica that if you are able to move to a safer place perhaps do so.
I hope the housing support worker can help you out as well....
Best wishes and good thoughts your way...

Shayatanica I am not sure what it means when others see your signs as well... Perhaps a connection with you and that person?