Wait till you have had your baby - then decide on how you feel.
I initially thought that I would be away from work for 6 months, a year tops .... and finally retrained for a new career when my first child was 7 ...
Do you have to work 10 hour days (as in, are those your contracted hours)? Or do you choose to, so you can choose to work shorter days and still retain a full-time salary (even if slightly damaging your short-term career prospects)? Is it travelling that makes the day so long, in which case can you find work closer to home / arrange to work from home one day per week / find childcare close to your place of work and at least have the company of your child when travelling? Do you have to return so early? is there any chance of extending your maternity leave, even if this is unpaid?
Equally, does your husband have to work such long days, or is this a choice he makes? For most people - not all, but most - there is a readjustment of priorities when their children are born. Things that were previously regarded as critical - keeping up with the macho long hours culture at work, rapiud career progression, keeping up with the work social life - become far less important, even irrelevant.
Soime people, however, never do become child-centred and do end up with childcare arrangements such as you describe. Nanny would be the best option as most childminders and many nurseries work 8-6 as an absolute maxiumum. People of my acquaintance do this - have a nanny 7 am - 8 pm every dayand have done since eldest child was tiny. I don't think it has had a healthy effect on the children, but each to their own.