Thanks for your advice Beata70. I am trying to stay positive.

Bridget both my previous IVF cycles were different. First one AF started at 13 DPO, the one after that I didn't get AF until a week after I stopped the meds, so my experience is they can be different, but on the other hand this may be a sign that things are different for you this time - and maybe a BPF! Fingers crossed for you!