Thanks for your replies.
I decided to take control and rang first thing this morning.
The nurse I spoke to was lovely and said I could go in and get a blood test.
When I got there, I told them I got two equal lines yesterday (I just left out the part that it was the afternoon instead of the morning)
All was going well until I had the internal ultrasound. I got someone who was training and had her supervisor there. They made me feel really really uncomfortable, but that's a whole other story.

Phone call this afternoon confirmed my suspicions and they said I will 'O' tomorrow. So I am super happy I made sure BT was today and not tomorrow. Transfer booked for next Wednesday. (Thaw on day 5, transfer on day 6)