C-Section

I am 37+5 and wanting a c-section... I'm scared they won't let me around the date I need... Baby is breech and I have another medical condition & I just found out my partner isn't having time off work (he has been to scared to tell me).
It's also going to be school holidays so I'll have my other child. I have no family here. I can fly my mum in but she can only help for 5 days...Do you think that they will let me have her around/on the date I need? What has been everyone else's experiences...