Putting this out here because I wish it was here when I was desperately googling this earlier this week and I hope it will save someone the panic attack I had because I thought it was all over.
I wrote earlier this week about waking up with a UTI the morning after transfer. I had to go on antibiotics and thought well, that's it. The next morning I woke up with a horrendous cold to add to the fun. The UTI isn't clearing properly, and I have now been put on a second course of a different antibiotic, this one for a week. It doesn't sound great for hopes does it? But here's the thing. I called the clinic, and they assured me it has no effect on implantation.
So, recap: I have a bad infection in the organ right next to the uterus, for which I'm now on a second course of antibiotics, and I have the worst cold I remember having as an adult. But both my wonderful GP and the fertility clinic have said it will not make any difference in terms of chances. So if you found this because you were frantically googling antibiotics, cold and embryo transfer, please don't stress like I did, go see your GP and they will sort it and it will be fine.
UPDATE: The really really bad, UTI, antibiotics for the entire tww, the horrendous cold that I'm still not recovered from, all the paracetamol, it did no harm. It was a clear BFP.