7 month old used to sleep through the night now she's waking up every couple of hours! Is it because of teething? She goes to bed about 9 o'clock at night wakes up at 12 I put her dummy in she goes back to sleep. She wakes up at 2/3 o'clock then sometimes 6 o'clock as well sometimes she sleeps OK and sometimes she doesn't I don't know whether it's because she's now in her own room. She's teething or she's just hungry which I don't get because she has food during the day, she also has crisps and bottles of her milk during the day. She is teething and her tooth is just under the gun and her gum is lumpy. I'm only asking for advice on it because she was fine for sleeping up until 2 weeks ago