Any advice please

I got engaged two weeks ago and was over the moon, a week later I realised I AF was late. I took a pregnancy test which said I was pregnant. I'm really not sure what to do. My partner and I do want children, but have always envisioned that being after marriage and little more time as just us.

I've been bleeding non-stop for a week and have taken one or two pregnancy tests a day thinking I'm having a chemical pregnancy but they're still showing very strong HCG wise.

We are really at a complete crossroads in what we want to do. We have ample space in our house, good incomes and can more than provide but I'm just not sure it's what I want right now. I also have a worry of people being disappointed in me and judging the reasons we got engaged. I'm so confused. I feel my reasoning for not wanting this are selfish :(

Any help or advice would be greatly appreciated.