You sound like you’re feeling low (or depressed?) but it’s positive that you want to take action.
Have you vented these feelings to others (friends, husband)? This alone may be enough to boost you. Has something happened that has played with your emotions recently? Is there a reason why you feel low and paranoid? What about speaking to a professional? I’m wondering, too, how long you have felt like this.
I do find as I get older that I have less confidence at times. When I was younger I felt invincible and thought everyone would be interested in what I had to say. I tend to take a back-seat more now; in many ways I care less but I would say I’m not as confident in crowds. And I certainly can’t be fussed to speak to people that I don’t want to.
It’s easy to think that everyone else finds socialising a doddle when the truth is very different.