Breastfeeding can hurt to start with.
I got a txt from a gir friend while she was in the maternity
ward with her new baby boy. Her message said "no one told me
breastfeeding would hurt this much."
I should have warned her and told her that breastfeeding might
hurt to start with, so that she wouldn't get the shock.
When I had both my children, breastfeeding did hurt
while we were learning. When I tried to breastfeed
during the first few days in hospital, I was very clumbersome and
didn't really know what to do. I would ring the bell
each time baby was due for a feed, and get the nurse to help me
latch.
I remember for those first three or four days after birth, it
really hurt when I latched my baby. I would be screaming
inside my head (not aloud as that would have really startled the
baby). It was really tough.
The reason that it hurt like this, I found out
later, was because I had grazed nipples.
When babies are latched properly, and breastfeeding and
drinking, there should be Zero pain. If you are getting pain
that 'makes you scream inside your head' then you need to remove
baby from latch and start again. Get your midwife to check
your nipples for grazes, cracks, chafing - there are things that
you can do to help this. (check out our Breastfeeding
Aide section, I'd highly recommend the
Purelan Nipple Cream and the
Hydrogel Discs. Take these with you in your hospital bag!!
For a perfect latch baby should have their mouth open wide like
a fish, in the shape of a K (like on the Kellogs cereal
logo). 
For the first three days baby was just drinking colostrum, small
volumes. But on day four my 'milk came in'.
My boobs seemed humungous, like flaming hot lead balloons.
Because my boobs were so engorged, my nipple seemed to shrink in
size and this made it difficult for baby latch. My solution
was to apply some heat packs about 5 minutes before feeding was
due, and sometimes I massaged a little milk out with my hand.
This engorged feeling only lasted about 2 days. But it was to
reoccur when my son got older, and would sleep for longer
stretches.
With my second baby it was definitely easier to get
breastfeeding started (though I did need a reminder about how to
position and hold this tiny baby) and I still had to teach him what
to do.