um things he might do are
- check ur BP (yes he will do this and if he doesnt find a new OB or ask him to check it)
- feel ur tummy
- measure fundal height
- give you a refferal for ur 18-20 week u/s.
- take a pee sample
- he might weigh u but i doubt it.
- listen to the heartbeat (dont expect this, every doc is different and some dont like to do this with a hh doppler till after 20 weeks)

HTH and have fun! hope all goes well!!!
*freaks out that u are already 16 weeks!*