I started waking at least once through the night from very early on but fortunately managed to get back to sleep. Not sure what to suggest other than perhaps trying some relaxation techniques to get you back to sleep when you do wake up.
I find dropping off hard, I seem to have fallen into a pattern of being a sleep monster for a week, then have an insomnia week. it'll take me past 2am to get to sleep and then I feel it's a very light sleep. I feel wired like I had 10 cans of Red Bull! I'm surprised how common it seems to be in early pregnancy, wish it'd make more of the symptoms lists.
I had that too, from about six weeks. Go to sleep exhausted at 10pm. Wake up at 3, 4 or 5 am absolutely WIDE AWAKE and alert as anything. If it was 3 or 4 I'd mumsnet or read for an hour then try to sleep. If it was 5am I'd just get up and kill time until going to work.
It's exhausting. If I did get back to sleep I'd then wake up with my alarm at half six and feel absolutely terrible.
The good news is that at 14 weeks it's just about subsiding. Hopefully it won't last too long...