Thank you all for your tips. I definitely needed to back off a bit with how forceful I was being - its hard when you only get those first few bits of colostrum coming through!

I'm happy to say that my milk came in yesterday only 48 hours after she was born which is great. I'm happily pumping away and getting a good result and the discomfort is starting to ease a bit. Heat is working wonders too. What I've managed to pump for DD so far will probably feed her for weeks. The tiny little darling is only having 1ml of EBM every 2 hours, but it is so important that she gets it this early. The best gift I can give her I think.

Now off to do some research - I need an electric pump LOL!