DD lost ability to sleep through since Christmas - what shall I do?

[whattheheck]

Spent Xmas at MILs - and 10 month DD was teething and miserable. In order not to wake the entire family in small house when she woke in night (she was staying in our room) I picked her up, fed her, gave her Teetha whatever as soon as she cried...
Now back home more than a week on and she is waking up at 1 and 5....I don't think her teeth are hurting so much anymore (she does suffer with them) and now fear she has got into the habit of waking. How can I get her to sleep through again? Was a weed last time and let her decide to sleep through (circa 8 months she cracked it) so no experience....