I have similar feelings. We're thinking of starting in a few months or so, when DD is one. If we're going to do it at all, we have to get on with it because I'm 40 now, and it took a year and a number of losses to have DD1. 😕
DD1 has only just started sleeping. She's a delight but there have been possible allergies and digestive issues. It's been tough, as it is for all new parents. I had a textbook pregnancy and a successful, complication-free planned c-section, but a hacking cough, sprained risk, then covid made the first three months of recovery utter hell, and now my scar is keloid. I would opt for a VBAC next time if I could, but I have reservations about giving birth at all tbh!
My partner pulls his weight, and we're a strong, communicative team, but still... I worry. DC2 will undoubtedly make our lives more difficult. There's money to consider - we rent a 2-bed house in London, and as I find being cramped really detrimental to my mental health, we'll likely need to move to a 3-bed, which is insane ££££ where we live. If the new childcare plans in the budget actually happen, that will make life much easier, but if not, we'll find it very hard.
I worry about my age and the risk of having a child with disability/health issues particularly. I worry about the impact of the baby on DD1 who will still be so little; I can't imagine loving anyone as much as her, or sharing myself with another child, though I know love expands. I worry about my relationship, and how little time we'll have for each other - I miss my partner sometimes now, and we do make the effort! I worry about my career, and how there I things I really should achieve before having more kids, even though there doesn't seem to be enough time left. Lastly, I worry about my body and the strain on it, how tired I'll be. How any hope of ever looking remotely the way I did before kids will be gone forever.
All that to say you're not alone. It's crazy that considering all of the above, it's still not a NO, isn't it? The pull to have another has been strong for me since DD1 was very little, and I feel like I don't want to leave her with no immediate blood relative when we die. But I also don't want to screw up her childhood by being perpetually stressed and stretched. Aargh!