Hi Balletmum - to be honest sounds pretty much like normal 2 week old baby behaviour - it is hard but remember "this too shall pass"!
In terms of the breastfeeding can you say more about what happens when she feeds? Do you have a very strong let down? If you do this is when baby starts feeding and you get a sudden gush of milk, sometimes it can feel a bit ouchy like pins and needles in the breasts, and if you pull the baby off the milk spurts out forcefully? Or does she gag and choke on the milk? The letdown issue usually sorts itself out over time as belgo says. In the meantime you can help calm things down a bit by not swopping sides each time you nurse - try feeding from one side for a couple of feeds in a row instead of offering the other side. You might find the "unused" side gets a bit engorged, that's fine, just express a tiny bit for comfort, things will settle down. Doing this will tend to reduce your milk supply a bit which also tends to reduce the forcefulness of the letdown, but at only 2 weeks it's pretty common to feel you are over abundant in the milk department - things do tend to sort themselves out with time.
Also if she is gagging on the milk you can try expressing a tiny bit of milk before latching her on, or try different holds - the underarm/football hold can help, or having her in a sort of sitting position if you can manage that!
Maybe the waking up and crying etc is not to do with feeding as much as her just getting used to being in the world and getting settled - have you tried warm baths, soothing music, maybe putting her in a soft sling and carrying her?
Or even better get someone else to carry her for a bit so you can have a break!
Good luck, hope things get better for you both soon.