Open Question: I’m being harrassed by a private security company, what should I do?

Here is a little of the story: Everything started last november when I went to shop at a local grocery store, I usually used the self check out, one day the stupid machine said please return the items to the basket, please return the items to the basket etc…sounded like i intentionally picked something without scanning it, and I didn’t, I am a christian woman who loves God and goes to church so I wouldn’t do any shoplifting anywhere, ’cause I have somebody in Heaven watching me all the time and because I don’t need to, never did. There was a manager of that store who heard the stupid machine saying that, after that I saw him pointing at me, like warning the other clerks from that store to WATCH me, like I’m a thieve, (This manager looked at me with dirty eyes before, I’m not ugly but have no intentions to have an affair with anybody….) the next time I went there, they brought their security team, they were using a white Ford Van, (like the ones they use on the tv show Cheaters) and they were watching me all the time and I believed even follow me home. To make it short, after that incident, any time I go to that store, the managers all leave whatever they are doing and watch me all the time. That was last november, and up until now September 1, 10, I see white vans anywhere I go, and every store I visit, I see security teams watching me all the time, like saying…we know who you are, or we are checking you out etc…I’m feeling really sick of all this, my husband doesn’t believe me. I spoke with a private investigator whom was going to charge me like $5,000 for an investigation to find out who these people are, and why are they doing that to me, money I don’t have. I don’t know what to do, I’m feeling harrassed, stalked, emotionally raped etc, They even went to the community college I was attending and warned the security people there about something, all of them wearing black shirts and walkie talkies around me, and saying barely that I could hear…she is the thieve.
As I said before, God knows I’ve never done anything like that, but these people keep following me wherever I go, and I believe we have our home phone and cellphone bugged. I know somebody said before that If you don’t do anything bad, there is nothing to be afraid of, I’M NOT AFRAID, but I’M SICK OF MY STOMACH, AND HAVE NO PEACE,I feel frustrated not being able to stop these so call security people following me around I feel they know all about me and I haven’t done anything…this is unfair, I took some pictures of these vans, but don’t know what to do with them…PLEASE HELP!!
Right now is 4.03 in the morning and woke up thinking about the whole thing couldn’t sleep…
Yesterday I drove to Glendale to visit a friend of mine who owns a business, I live in Orange county that was a long distance…when I left the office to go to my car…I saw 2 White Ford Vans parked on the parking lot without anybody…I’ve even seen police vehicles looking at me weird…and please I’m not being paranoid…I’M CRYING RIGHT NOW… I need a wise answer…
Thanks for taking the time to read my story and God bless you all
I’M NOT CRAZY AND IT’S NOT ALL ON MY HEAD…I KNEW YOU WOULDN’T BELIEVE ME..