I’m very glad you wrote. You are right to be concerned. This isn’t healthy. You don’t want to live a lifetime with doubts like these. Your husband doesn’t want to live a lifetime responding to your insecurities. This is the kind of behavior that can wear out a marriage.
Unfortunately, I don’t have an easy answer for you. Some people who behave in this way have been terribly hurt by someone in the past and need repeated reassurance that it won’t happen again. Others suffer from an anxiety disorder. Still others have a personality disorder. And sometimes what seems to be just one person’s insecurity is actually a signal that something larger is amiss in the couple’s relationship. Without more information, I can’t help you sort this out. I also don’t know enough about the available resources in your country to give you guidance about who to contact for help. Your physician might be able to make suggestions.
What I can do is strongly suggest you and your husband see a mental health professional for an evaluation. An experienced counselor can help the two of you understand what is causing your behavior and can help you learn some new ways to interact that will help quiet your jealousy.
Please do follow through. It sounds like you and your husband have the potential to have a happy life together. Get the help you need so that potential can be your reality.
I wish you well.