Thank you everyone for your replies.
After my visit to A and E on Sunday the doctor told me to take an additional 1.25mg of bisoprolol for 3 days so now taking 2.50mg per day.
I think I was a little naive but trusted the hospital to reduce to 1.25 after my cardioversion he said my heart rate was lower so to do this.
I have an appointment with the nurse later today at my surgery and the doctor on Thursday which were arranged before my cardioversion so will be telling them what has gone on.
I feel fine now and my heart rate is in the steady 60’s so just hoping things will settle down and I stay in sinus rhythm.