I think mine are about to kick in too!
First trimester I felt AWFUL, knackered, crying blah blah.
At 11 weeks 3 days, almost dead on beginning of second trimester, I felt better. Things haven't been perfect (random aches and mild constipation and weeing all the time), but mostly I feel as if I have had that 'glow' thing to a degree. Hair lovely, skin lovely, not overly lardier, no hayfever, food intolerances gone, decent amount of energy - physically and emotionally. Pretty good.
Then yesterday, almost dead on the beginning of third trimester at week 28, I woke up with hayfever, last night I ate bread with my dinner and had the normal non-pregnant resulting stomach issues last night, I've got spots on my nose, a huge plooky on my back and slept like the dead last night (which would almost be non-pregnant normal). Woke up with hip ache and that kicked-in-the-vag feeling. It feels like all the good hormones have pushed off over night or something!
Nice.