I rang NHS direct, as it was called then, because I had woken to feed three month old DS and was in agony with stomach pains. I kept trying to go to the loo, then rocking on the bed, repeat....
I phoned, a Dr called me back within minutes. He said 'I am 23 miles away, you need medical help quicker than I can get to you and there are no ambulances available, can you get to MIU?'. I could, we woke 12 year old DD up and told her she was in charge of the babies (15 month old as well) , while DP ran me there, then dashed back.
The nurse in MIU looked after me for a couple of hours, while I waited for an ambulance.
I later had surgery for a strangulated hernia. Life or death stuff, as correctly recognised by them.