So long as you have travel insurance and have disclosed you are pregnant plus all other health conditions, including pregnancy related ones you will be fine.
A&E is called ER and you dial 911 for an ambulance.
The next people to call are your travel/health insurance if they require preauthorisation as soon as you get to hospital. If you are very ill, the ER staff can take your insurance info and do this for you. If the insurance provider do require it and you skip this step, they might deny your claims.
Note, you may get several bills if you do experience an emergency. It is common to get at least three separate bills for one ER visit:
- one from ambulance
- one from hospital that runs the ER
- one from each consultant you saw in the ER
If you are admitted to the hospital, that will mean further separate bills.
Your insurance should cover them, but read the excess rules carefully. Some policies you have to cover first £500 of each bill instead of each incident so even with insurance one ER visit can still cost you £1500 or more.
Make sure your travel insurance includes repatriation costs to fly you back commercially or via private air ambulance to the U.K.
As your baby will be too young to be born prematurely, you will not have to worry about taking out coverage for a potential NICU stay of an infant.
If you are travelling as part of HMGov, you should get a letter saying bill all costs to NHS, which is much easier!