Call an ambulance. When you get to the hospital, demand to see the ob/midwives on duty now. Hell, threaten them with lodging a complaint if they won't act in a manner you are happy with.

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Please don't call an ambulance if you have another way of getting to hospital. Ambulances are for emergency situations and arriving in one will not make the midwives treat you any better. If anything they are more likely to be exasperated at you using an unnecessary ambulance.