I'd say it's a bad sign that he speaks badly about people, especially about the mother of his child.
he dose brag about his daughter...more then talk about his ex but ever now and then he brings her up, but is the feel cause im prego or just worried
You should be hearing him brag about his daughter not his EX. If he talks her excessively than there is a reason behind it. A man who cares less about his ex would not even bring her up regardless of their children together. My husband has a child with his ex partner, but he talks about his child, not her. He can't stand her.
I would talk to him about it and tell him you're not comfortable with him always talking about his daughter's mother. You need to realize though that she will always be a small part of his life. Even after his daughter turns 18 they will still have to deal with each other because they will still have a child together. And I agree talking about her so much could be a cover up for feelings he still might have for her, it might be nothing but you still need to talk about it, especially since you two are getting married
I say tell him your feelings but the mother of his first won't magically disappear after 18 years either. They will be parents to her forever son that means graduations, weddings, grandchildren etc. Stay civil.
From experience I say have a heart to heart conversation with him but be open minded and emotionally ready for every and anything when asking him questions and what ur main focus is making sure he is completely over her cuz talking bad Could really be a cover up