Ash, it takes a few weeks for ur milk supply to settle in. Mine has now settled and I am not uncomfortable anymore. I did worry that that meant I was not making enough, but Bry is settling fine and sleeping well and is gainging weight so he is getting enough. Also feeds are taking less time as he gets the majority of the milk quickly so it used to take me 45 mins to feed him, it's now taking me 20-30 and he generally only needs one side unless he's unsettled or starving. I was even able to feed him last feed and express 80mls. Considering I don't express well, I think that's good.
It should all settle down soon. I hope the pain lessens for u.....