My DS is 8 months. I'm the main earner and DH doesn't earn enough to cover childcare (he'd be left with about £100 a month after we'd paid tax and childcare for working full time).
I have returned to work. I planned to do 12 months Mat leave but honestly, i got to a point where i was watching the clock for bed time and just wasnt enjoying my lovely snuggly DS as much as i should have been.
I returned to work, DH is now a full time SAHP and it's absolutely brilliant. I earn £48k working 4 days a week; on my non working day DH does a shift in a local pub and he also does a half day shift at the weekend because he felt he'd need that time for his own mental health and I fully agreed.
The way we approached the finances was sat down and worked out how much we realistically needed. Not just to cover bills etc but also averaging out what we spend on clothes, treats etc as well. We also evaluated whether that extra £100 was worth DH working full time and we came to the decision that he would be happier looking after DS at home than working, so that was that.
No one can answer the questions for you here OP, but I would wait a few months before you start making decisions. 8 weeks post partum is very very early and at the moment you just want to be with your baby. You might feel that way in 12 months time, 5 years time etc but you also might not and either of those things is ok.
At 8 weeks all i wanted to do was curl up on the sofa with my boy and never leave. I thought I'd feel that way forever and was desperately thinking of ways I could avoid going back to work. Now though, I don't love DS a single bit less (i enjoy him so much more at this age!) but I find working makes me a much better mum. Im more fun and relaxed around him, we giggle more and I'm back to finding every little thing he does just brilliant. I lost that when we were home together 24/7 i think.
Do what's best for you, but don't make any decisions yet 