People always seem to manage when it happens it's just what we do. I have been there and know how it feels and in the past have had to cut back on those things I would have preferred not to.
Luckily I am in a fortunate position now but I still have to save to be off and would never have the luxury of staying at home with my children. I will have to go back to work when LO is 4 and half months. My hubby now works from home so is able to pick our 3 children up from school and will have this one at home once I go back to work.
We have a combined income of between £4,000 - £5,500 net per month, I usually take home £15-£20k bonus at the end of the year, which sadly I won't receive this year as I will be on maternity when my accounts are finalised.
I still intend to visit the hairdressers weekly, beauty parlour monthly, spend lots of time at our place in Spain and buy as and when I want it, so we are saving hard as by the time I pay my company car tax, my maternity benefit will be virtually nothing.
Our monthly outgoings aren't huge, only around £2k per month, so this is perfectly doable short term.
I am sure that you will manage, there has been some great money saving tips posted here.