Is this regret?

I’m currently married and trying to have a baby, and find out I don’t have as many eggs as a should for my age, my partner also doesn’t have the best sperm so we’ve had two IUIs and deciding on IVF (as it’s super expensive).. this is where my regret comes in, I was pregnant before when I was 15.. I was conflicted on having an abortion but my current boyfriend was very toxic (physically&mentally).. I sometimes think about how I could’ve already been a mom and how my life would be so different, I could’ve had want I’m struggling so hard to have now.. I love my husband, and I know he’s the best partner to be my child’s dad, but I can’t help but think I made a mistake, I remember being pregnant and feel jealous for the 15 year old me who got to feel it.. how do I cope with this?