All I can add is - if you are ever in doubt, give them more booby or bottle!! Its the least harmful thing you can do to their system, and you'll probably get the best result from it.
Another thing it could be is just a change in patterns. Jenna started changing her sleep routine at about this time (actually about 5months, but all babies are slightly different) and went from sleeping 8 hrs to waking 3-4 times a night!!! God it nearly killed us!

Your baby may need to learn how to self settle, which is so hard to teach. The best thing I found we did was move Jenna to her own room (cause our noises were keeping her awake) make sure that she is warm enough (and dry enough nappy wise) and try to put her to bed really drowsy, not asleep.

There are heaps of different opinions on sleep routines, so please dont take my experience as gospel, but just a suggestion that it could be the start of more. AndI found solids made it worse!! Not better!

Good luck, heres hoping its just a pesky growth spurt! Time to break out the 0's huh?