I can actually understand how you felt, Luckygirl3, as I have had a similar problem and it is not quite as clear cut as it may look to others. The thought of waking my husband and driving in to the hospital in the middle of the night is not appealing and I of course do understand that this is very necessary for some, even most cases but not every pain is a heart attack.
I also have an arrhythmia and have had night-times being woken from sleep with similar pains. I, too, decided to sit it out, promising myself that I would contact the doctor if it happened again. Only after the fourth time (I didn't keep my own promises...) did I call my GP who, after listening to me and asking a few questions said 'the ambulance is on its way' and would not take no for an answer. The ambulance crew said my arrhythmia was showing in the ECG and they had to take me in to A and E. I was reluctant as my last visit took over 12 hours (they 'lost' me!)
I can perhaps suggest that you speak to the wonderful cardiac nurses at the British Heart Foundation on 0808 802 1234; they are extremely knowledgeable and although sometimes will follow the usual protocol of 'go to A and E now', not always. They are available on weekdays only, 9 to 5 p.m. They understand the disquiet we feel about having to go in to A and E.
It really is not as straightforward as others may think and not every twinge is a heart-attack in the making, although, as women and men present differently with heart attacks, no one wants to be responsible for letting someone slip through the net.
I really wanted to say that I understood your nighttime dilemma. I hope that you are able to enjoy your seaside break - hopefully in some sunshine!