Thanks for all of the advice. I'll have a look into buying that book. I don't want to contact my DSN as she seems to know nothing and during the pump course last week I had to correct her multiple times. I'm honestly better off asking strangers on the internet lol. Unfortunately, I didn't see any of your responses until this morning, after already going ahead and trying the new rates. Maybe I'm too eager to get this right and have to realise it will take time. Fortunately I didn't go hypo but I still think the rates/times will need adjusting some.
Here are the results from last night (went to bed at 11pm with BG 4.7):
1:00am = 5.1 - Even though I wasn't low I had 5g carb because I was paranoid I had overdone the basal rate
5:45am = 7.3 - looks like I didn't need the extra 5g
6:30am = 6.1 - maybe 5-6 rate is too high?
7:18am = 5.4
I may lower the rates slightly (just to avoid any hypos) and try again tonight with no food before bed. What do you think?