Re: Should I feel insecure?
As I said already…if the current stress/drama is too much for you that you’d rather be treated like crap than stand up for yourself…how are you going to protect a child if your husband/in-laws treat that child badly too? What makes you think they’ll provide you with any type of physical/emotional support when you’re pregnant/recoverning from birth/raising a baby?
I agree that a divorce with a child is a TERRIBLE thing. Which is why I have no idea why you want to have a baby with your husband when you do not feel secure with him emotionally/financially. 
Your in-laws made it clear that they were not going to welcome you as their bahu before the wedding. You went ahead and married him anyway and I imagine a part of you hoped that as time goes by, your in-laws will change their mind and accept you. Well 6-years later that hasn’t happend. So please don’t make that same mistake and fool yourself into thinking that your husband or in-laws are going to somehow change their attitude/behavior towards you just b/c you brought a baby in the family.