@Scottishgirl85 my friend had ERA EMMA ALICE before a transfer as it took her months to get her 4 embryos. I would also recommend some form of imaging either a HSG or saline scan, because ultrasounds can miss a lot.
I would do these tests if I were in your case, it has the same impact as a scratch, so if anything it will help your chances.
@Porridgeislife as already mentioned you don't have to test again. The lab can recommend a retest if the microflora needs treating, they did in my case, when it was as bad as it could get. But my specialist said we should try a transfer first, which was unsuccessful. So I've insisted on a retest now, I'm hoping it will come back and say we're all good now, as there have been improvements in my lining since treatment.
@seven201 try to keep an eye on your blood pressure when you're at home and relaxing. If it is high then the anaesthetist may give you an antihypertensive on the day. I'd expect with the op imminent it's going to be on the higher side, these things are so stressful! It's great it's not far away now! I bet it will feel great when you know it's out the way.