I know some Singaporean couples go for IVF in Bangkok as the cost is much cheaper than in Singapore, even after accounting for air tickets and accommodating. PM me if you want the contact.
Adoption is another option. My friends who adopted love their baby to bits and it always make me smile to see their family photos. It's an act of great love, completing your family while giving a baby a loving home.
It can be hard if your husband is not completely on the board. Perhaps you can talk to him and work out what both of you need to do as a couple. Having a baby as a married couple is a matter for both, not just one of the couple. All the best to you and hope to hear that you are having a baby soon!