Pregnant. Fiancé doesn’t want baby

So my fiancé and I have been together for 13 years. Just got in engaged last January planning to get marry next year since it’s a destination wedding.

Today, I went to PPH because I was 4 days late and turns out I’m pregnant. 4 weeks and 5 days (estimated).

We have a 4 year old who will be 5 in Oct. My fiancé has a 17 year old. My fiancé said he didn’t want anymore kids after ours but last summer he kinda made hints and jokes that our son needed someone his age to play, and at one time even asked our son if he wanted another sibling..but for the most part always said too he didn’t want anymore. When people would ask when are we gonna have another he would say I don’t want any more kids. But I would tell people I want one more and he wouldn’t say anything. But he knows we have all of our son’s old clothes from newborn-4T just in case we had another boy. I told him today and he said I know where he stands. That’s all that was said. I don’t know how to feel. I wanted to get pregnant but not right now with everything going on and what we have planned like a wedding , sports events, camping, parties etc etc. but I feel like if I abort the baby then I’ll never have the opportunity to get pregnant cause he might start really thinking about vasectomies.