This is my second marriage. No kids from first marriage. I often find myself thinking of my first Husband and wondering if things would have been different if we had children. Maybe we might still be together. Is it ok for me to feel like this?

If you're still looking back to your past then maybe you're not happy or satisfied with your current relationship or you still have lingering regrets for that person. Try not to dive into the thought of what ifs since your present and future relationship holds a much brighter tomorrow. Try to talk to your current partner, maybe you're unsatisfied with something.