A few days after my five day transfer I was convinced it hadn't worked, as I didn't seem to have any pregnancy symptoms and didn't feel any different. However, symptoms may not mean anything as they can be caused by the progesterone medication.
A few days after transfer, I got a mildly stuffy nose and panicked that if I came down with a cold/fever, it might ruin everything. It didn't develop into a cold, and as I've noticed this several times in pregnancy, I now suspect it was pregnancy rhinitis.
Maybe five days after transfer, I was lying in bed one morning when I felt my uterus quivering slightly. At some point I stretched my arms up above my head and felt shooting pains each side of my abdomen, like I'd pulled my tummy muscles. I now suspect that was round ligament pain.
I initially tested too early, got a negative result and was upset, which was really stupid as the final result was a positive!
My sympathies with the tww as I thought I'd cope with it well and not obsess about it, but that turned out to be easier said than done. Good luck!
And Kit1411, my initial positive results were very faint and slow to appear, but after a few days they appeared almost instantly and were darker. I can't see your pic very well, but I'd guess that any second pink line which appears in the specified time is a positive.