Heart problems with a baby

I have always wanted kids. And for 2 years my husband and I tried nonstop and when we had lost hope we were beautifully surprised with a finally positive pregnancy test result. I just had my baby at 39 weeks to decrease any chances of heart failure. The unfortunate side to all of this is my husband and I want more than one child but the hospital bills they charge for my condition is astronomically higher than other women with no issues. It's heart breaking I was told I can't even attempt to try again until 1.5 years because my heart started leaking when I became pregnant and it needs to heal again. I'm turning 31 years old and I'm scared that by the time comes I can try for another my body won't be able to handle it. Just wanted to share my story and say, I hope those trying for a baby, it comes to you and those healing are all relieved. Bless you all always!