Thanks ladies
I ended up speaking with the nurses who said I needed to keep taking (grrrr as this was different to my first instructions and only found out when I checked how to wean off them), but they said wait till 7 week scan (on Monday) and FS will tell me what to do.
It was a natural FET and though its taken over two years the 'issue' is my over-zealous immune system so I'd think my hormones etc are ok...but taking so many other things I may as well add pessaries to the mix! Looking forward to stopping them.