Looking back at First trimester

Why do I feel like I'm back in First trimester?

• I need to nap as soon as I come back from work... Sometimes the nap goes on until the next morning.
• I'm actually able to sleep
• I can't stand for more than 20 minutes before getting light headed
• Less random tears from seeing something cute, less nightmares from seeing violence on t.v.
• My breasts are almost back to their original size
• My dreams are "normal dreams", i.e.: if I fall asleep reading a book, I'll dream I'm one of the characters
• Food cravings and aversions have dissipated
• People on the train don't offer their seat (usually - but yesterday a really nice man did!!! I'm still in shock. He's my new hero.)

How do I know I'm NOT back in First trimester?

• My belly is way too big for this, and people notice/ask about my pregnancy
• My baby is way too active for me to forget it's there
• My legs swell easily
• My breasts, though back to a normal size, have recently secrated stuff they never had before
• I can count to 30 weeks without doubt, and
• My 30 weeks echography is scheduled on Tuesday!

It seems like either my body has now adapted to the higher level of hormones and is going back to a more stable state OR maybe the fact that I'm sleeping more/better helps me deal with all the symptoms I've seen fade recently.

The mystery is complete.