<human>: Could you distill the essence of the text into 1-3 sentences?

I love in California and have been living in my current residence since June of last year. My lease is up at the end of the month and will be switched to a month to month lease.

Lately, I've been having some problems with the property manager/landlord. The owner wanted to sell the house and the PM notified me that this was happening about two months ago. We had a few discussions (read: light argumentation) about showings and timings and eventually were able to see eye to eye on the situation. However, I've still felt very bitter about the whole situation because of how he continues to treat us. 

Today, I come home and find that the door that goes between my patio and my garage (enclosed area) is locked. I knew I didn't lock it myself because I never lock it and I was also in a rush this morning. Like I said, it's an enclosed area and one of my two neighbors would have to jump their fences to get in. It's also locked from the inside, so whoever went out the door locked it when they came in. I also found my blinds open in the living room, as has been done in the past when a realtor has brought by prospective buyers to the house. 

I called my landlord and left a voicemail and text for him to contact me. He called me back and quickly stated that another realtor had contacted him yesterday to ask to come and do a showing but he never gave her the "OK" to do so. He stated that it was simply a miscommunication and that she must have come by thinking that it was okay.

I should mention that I am also a disabled veteran that suffers from PTSD, anxiety and depression. This situation has left me with non-stop jitters since I came to find someone had entered my home without my permission.

What sort of legal recourse do I have for something like this if any? The landlord didn't break the contract but another realtor entered my home without his permission.
<bot>: Landlord states that a realtor thought it was okay to come into my home but I never gave permission and was never given notice. What can I do?