I have huge paranoia! I plan to make a blog of all my paranoid thoughts, and try to make them hysterical.
My advice is not easy, but the people who are there for you will understand.
Paranoia is like rot, the longer you let it fester, the bigger and worse it gets, especially with other people.
To the people you know, if it's a paranoia you feel is oulandish, bring it up kind of in a joking manner. If it's someone close, just be honest and have a "hey, where are we at, or how are we doing" conversation, in which you can bring up your fears or paranoia, and have it dispelled, or confirmed, which ever may be the case. You have to be ready for either, but I've found when I've faced it, whichever way it goes, I get peace of mind, which is sooo important.
I just asked my husband last night if he was poisoning me. LOL!!! I've asked him before this very question, and this time he wasn't so accomadating. It was a long 30 seconds. Then we laughed a lot and I asked him how he made dinner taste like almonds hee hee

I hope this helps!
Hugs,
Tiana