A friend of mine IRL asked me yesterday whether I had any "symptoms" yet. Not that she truly thought I'd be having pregnancy symptoms one day after my embryo transfer; she just knows firsthand how our minds like to play tricks on us during the 2WW.
When I think about this question logically, I wouldn't expect to have any symptoms of pregnancy prior to a positive test. My mother never had any early symptoms with her pregnancies. (Reportedly she didn't even know she was pregnant with me until she was about 4 months along; she's said her periods had been irregular due to stress following her father's death, so she didn't notice the missed periods.) My sister told me that she didn't have any pregnancy symptoms until 6 weeks, two weeks after she'd already seen a positive pregnancy test.
I've thought I "felt pregnant" in many, many past (failed) cycles. Ironically enough, during the one cycle when I actually *was* pregnant, I didn't *feel* pregnant at all. I was actually in the midst of starting a treatment cycle when I got the BFP.
I seem to always have sore breasts on progesterone, so that's definitely not a symptom of anything. (Plus I had sore breasts days before the transfer.) And the lengthy list of potential side effects of PIO pretty much encompasses everything which might be interpreted to be a result of early pregnancy.
I have perceived some very mild cramping in my lower abdomen today. (Actually, I noticed it yesterday evening, too, but--TMI--I was constipated and figured it was due to that.) It could be all in my head, but I think I'm feeling it.
I like to think that this is the feeling of one or both of our embryos settling in for a nine-month stay. Who knows.