DD2 was doing the same thing the past 3-4 weeks, and she is over 24 lbs, so imagine trying to move that into a crib without dropping or waking her! Turns out, last week, she popped two teeth out, and has been sleeping like a champ since. I would go with teething or anxiety. Either way, just try to wait it out. We slept A LOT less when they were younger, and it was for longer than a week or two, so try to keep that in mind. If that doesn't work, drink Mountain Dew ;)
And, let me add this. I have an older girl who has STTN since forever, so they do get better. The first year is really a doozy, so if you can wait another 2 or so months, you will find it a lot easier to cope.