Firstly, thank you to everyone who gave me their reassurance last evening.
Over four hours passed without a call back from 111 and I had no noticeable effects from taking the extra tablet. I had seen the sense in the advice I got from the people in this forum, and was on my way to bed when the call from 111 came.
I said I had felt fine all the time since taking the tablet, answered all the questions, and was told to go to A&E within the hour because the dose was dangerous for my weight.
Apparently the dosage is correlated to your weight, and I weigh 8st 4lbs, and two lots of 3.75g of Bisoprolol was too much.
She said I mustn't delay, to get there within the hour, which I admit was a bit alarming given that I felt fine.
So we went to A&E and I immediately had the usual tests and was told a doctor would see me. It was Saturday night and as the night wore on it got busier and busier.
The waiting time when we arrived was two hours. It changed to four, then six, seven, seven and a half, and it was eight hours before a doctor told us she was surprised that 111 had said to come to A&E at all.
I had asked several times as the night passed whether I needed to stay and wait and was told yes, I needed to be seen by a doctor. So I thought they had found something that they were concerned about and we stayed, but really it was all for nothing.
So the advice given by the lovely people in this forum was as good as it could have been! We live and learn. 😊