How to make my parents stop worrying

I'm at my wits end, haven't the slightest idea how to make my parents stop worrying endlessly about me and my marriage. I've been married for about 15 months now. There have been several issues, mainly due to my very interfering and dominating FIL and sometimes my over-dramatic MIL. And my husband hangs on their every word - I suppose you get the picture. Anyway, I never dragged my parents into any of these issues or complained nor did I say anything against my husband and in-laws to them. Unfortunately, my in-laws (who live in the same city as my parents) used to often call or meet my parents and create a lot of drama in front of them - they would tell them mostly lies about me and cry about how much I hurt them, etc, etc! So much so that it even led to some misunderstanding between me and my parents. Finally to clear the air between us, I decided about 2 months back to tell my parents few things about my in-laws' nature and the lies they easily tell - primarily just to make sure my parents didn't get over anxious everytime my in-laws created some drama in front of them. It worked for about a month. My parents didn't succumb to my in-laws' paranoia and all was well. But in the process they have started to worry terribly about me. They are quite convinced I am not happy, they worry so much it affects their mental and physical health. No matter what I say to convince them, they don't seem to get convinced. I have two younger siblings who are still in undergrad and I am worried my parents' anxiety will affect them. I think my parents also in part, feel guilty and responsible for this because mine is an arranged marriage. How do I make them feel better?

Knowing my in-laws and husband, these issues are not going to vanish instantly. It will take a lot of time or it will probably stay on forever. Although I used to get agitated a lot initially, I've now learnt to better tackle it and not let it overwhelm me or affect my health. Although things could be a lot better, I am atleast not miserable and suffering. So how do I make my parents understand that? How do I make them more resilient? How do I make them understand that things won't always work out perfectly the way we want it to, but that we can't allow it to control us? I just want them to be stronger and enjoy their life without worrying endlessly about me. Pretending there are no issues is not going to work anymore, thanks to my in-laws. So I want my parents to get convinced that I am strong enough to handle situations and hence not worry about me. What can I do?

People with issues in your marriage, how have your parents taken it? How has it affected them?

Thank you.