If your daughter is still breastfeeding she doesn't really need much else at the moment. 'Real' food can be more for snacks and enjoyment at this age as your milk still provides most of what she needs. My son was very windy and wakeful at night after I introduced solids. I think I had tried to rush it all (I was scared by hv who told me he had to have beans etc. for iron as we are veggie and bf - have since been told this was utter rubbish as breast milk still does provide iron). I went back to really basic foods for some time until his system seemed to mature a bit.
Dr. Sears recommends bananas, rice cereal, and pears for a 6 month old, then avocado, peach, carrot, squash, potatoes, yams, barley cereal at 7 months, no meat, cheese, beans or peas until 9 months, with no cow's milk, other cereals or fruits until a year. I think we do rush weaning in this country and perhaps don't do our babies any favours. My son now eats a good mixed diet and is not fussy or particularly windy (well, ok, we are veggie after all ).
If you want to read more, this weaning diet is from The Baby Book by Sears and Sears. It's a good read if you are interested in their attachment philosophy and don't mind a fairly simplistic writing style.
I do hope things improve as it is miserable to be up at night if you are used to getting a full night's sleep.