Baby #2???

I’m mom to a wonderful 3 yr old girl and while she needs support in terms of speech and some social development (she’s in daycare, speech therapy and we are also awaiting autism assessment), I think I may be ready for baby #2. My plan was always to start trying again once she got more independent (this was before I started to notice delays) but now I know she’ll still need my support for longer than I expected which I’m fine with since there’s a plan in place. My main concern is my partner. He was very unhelpful during my first pregnancy and made me feel bad all through and even with my daughter I’m the one doing all the caregiving (in addition to working part-time). I feel like if I choose to do it again I’ll have to accept that I will still do it alone. But it’s my wish to have another child. Should I just focus on my daughter or go for what I want even if it would be a lot to handle alone?