With my 1st, I ended up not being able to have any caffeine at all towards the end. At the beginning of the pregnancy I was waking up at 5:30 am for work. I'm not a morning person, and it was impossible without out my coffee (normally 3-4 cups before noon.) I was able to slowly reduce it to 1-2 cups. Then by chance I changed shifts to 10 am, then again to later in the afternoons. I didn't need the caffeine as much, so coffee became an occasional thing. That all changed in the start of the 3rd trimester. One day I treated myself to a huge latte, and I swear it felt like my baby was going to jump out of my belly! She was shaking, rolling, punching, and kicking so much I had to lay down. Not only did it hurt like heck, but was making me nauseous and I felt like I had motion sickness. After that, anything with caffeine, even chocolate, would make her soooo jumpy! I just couldn't take it, plus I thought it couldn't be good for her.
This time around, I'm kinda starting the same way. (only I'm a SAHM much easier!) I'd cut all caffeine now, but I've been getting terrible headaches that only coffee will cure. It's weird, I haven't been drinking very much coffee at all before I got pregnant, maybe once or twice a week. But since I've been prego (9 weeks) I have to have something with caffeine every day or I get a killer, full, head in a vice ache.