Thanks for all your suggestions.

I bought some gripe water which Regan absolutely hates, I only give her 1ml (and I've only given it to her twice cos she hates it so much and gets really upset) but the 2 times I've given it to her seemed settle her a lot quicker. I'm also watching what I eat as I had eaten some fatty fast food which I think coincided with her restlessness. I also bought more lavender and chammomile oils and I'm burning them in the oil burner constantly and putting them into her bath which has also helped. She actually slept 4 1/2 hours straight last night which was pretty amazing! She normally sleeps 2-3 hourly.

The chiropractor might be a good avenue as well (I need to go too).