Auntiedee- kitchentable has some good, practical suggestions about part time/ flexi working, Which might enable you and your DH could perhaps each Achieve a better balance.
But remember your child will be fine either way.
And this isnt dismissing your feelings, which are clearly very real, but it may reassure you to know that it's quite normal to feel like you do when maternity leave is drawing to a close, and you may well find the actual return to work far easier than the thinking about it.
I sometimes wonder what id have chosen if, after having my dc1, we could have afforded for me to stay at home. I suspect, in all honesty I might have given up work, mainly because 12 weeks maternity leave is quite short and being at home seemed far easier than the thought of combining parenting and working! However, we needed my income so I went back. although physically it was tougher than being at home, i realised pretty quickly that dd was fine, we were keeping a roof over our heads and food on the table and i was retaining my place in the workforce. It was working out fine. Suffice to say that when dc 2 and 3 came along, by which time DH was earning more, mortgage rates were lower and we could afford for me to stay at home, I actually chose to continue working even though childcare cost the equivalent of my salary!
This isn't about me saying 'do as I do' because everyones feelings and thoughts are unique to them. If in your situation, you would genuinely prefer to be a SAHP and your DH would genuinely prefer to be a WOHP, then it's sad that you can't achieve that right now, but you could hopefully reach some compromise through both working part time, your DH looking to increase his earning power etc. And in the meantime try to focus on the fact that your child isn't missing out and will thrive.
I just wanted to share my experience because sonetimes even a situation of no choice can be really good. I can honestly say that having children was the best thing I ever did, and staying in the workplace was the second best thing I did.