Estranged Daughter having my first baby

Looking for any thoughts resources or input here. I have been estranged from my father for 3 years and am now pregnant with my first child. I feel so excited but also starting to feel a lot of the other feelings involved with wrapped up with the choice to not tell my father.

My brother and father still have a relationship and I know my brother will be upset that I am not telling my father about the pregnancy. But I really feel as if there is no way to tell him without it seeming like an invitation back into my life.