Macca, it sounds like you're doing a great job hun. It is so hard in those early days, you can't imagine what you would give to have more than 2 consecutive hours of sleep! It does get better, I promise

In my experience, formula did not help my DS to sleep. In fact using formula greatly added to our woes, in many different ways. Thank goodness we were able to keep BFing, if not exclusively, it was our saving grace. If you want more info, I'm happy to give it, but I won't ramble on unless you're interested

Don't kill yourself expressing, it really just creates a whole lot more work for us......expressing, feeding from a bottle, sterilising etc etc. Although tiring, much easier to just feed from the boob in the first place! Obviously though, if you're really struggling, getting DH to do the odd feed during the night could be really helpful. And make sure you sleep when you can during the day, it makes all the difference, truly! Good luck