I never thought this would happen & not sure what to do..

So, I am 21 my boyfriend is 22 and he knows that i wanted kids and marriage sooner than him. We have been together for 3 years. We have had multiple conversations and debates about this for a while and he has remained that he wants to wait 3-4 years for marriage and 3-5 years to get pregnant. I then found out a few months ago that becoming pregnant may be really hard for me as i have low egg quality and have not been ovulating for about a year. I was devastated and this made me want to start trying even sooner as we planned to have 2-3 children before we hit 30. He said he would think about it but definitely wants to wait at least one more year because we may be moving back to his home country......Well....I’m pregnant and as much as i want to be excited I am dreading telling him because i feel he will not be excited. Just looking for advice and maybe some stories of other’s experiences.