Happy but conflicted, not sure what to do

Today I have mixed feelings, I’m a mother of a 6 month old. But I found out I was pregnant today. My partner the other day said he didn’t want anymore children, and that he would be upset if I were pregnant again because now is not the time he said. Personally I don’t think there’s ever a right timing for kids and to me children are blessings. He hasn’t done anything to avoid pregnancy either. I’m excited but scared for his reaction today. Any thoughts on how to tell him?