DD2 has pretty much slept overnight in 4 hourly chunks (7-11, 11.30-3.30, 4-8), since about 3mths old- but since being poorly with a cough/ cold/ temperature for a week in mid December, has suddenly started waking every 60-90 mins throughout the night. She wakes up hysterically screaming (no tears though), so not a gradual grumble for 10mins progressing to real crying like she always used to. She doesn't seem fully awake/ aware, and within 5 mins of latching on is back to sleep again.
Her daytime naps haven't really changed- about 2-2.5 hours for morning nap, and around 1 hour for afternoon nap. She does seem to resist afternoon nap more now, but after attempting to drop afternoon nap for a few days it's obvious she still needs it as she's so tired/ cranky without it.
Our day routine is roughly:
8am-10.30am Awake
10.30-1pm Morning Nap
1-3.30pm Awake
3.30-4.30 Afternoon Nap
4.30-7pm Awake
7pm Bedtime
She is bf on demand, has always been bf to sleep (possibly not my smartest move ever
), sleeps in cot in our room (sometimes co-sleeping from 4am bf onwards), has always gone straight back to sleep after a night feed, never needed black out blinds for daytime naps, dummy and bottle refuser, spoon refuser as well (unless it's something sweet) so solids are mostly baby-led & I do worry she's not filling herself up enough but she's just not that interested/ weight gain not an issue.
I'm just not sure what's causing the frequent night wakings? She doesn't seem to be settling in a deep sleep like she used to- I've made sure heating isn't clicking on/ room is good temp/ no obvious signs of teething/ doesn't seem to be hunger as falls asleep again within mins of latching on (even keeping her awake to feed for 20-30 mins doesn't result in any longer than 60-90 mins before waking again).
I don't know whether she's having nightmares (straightaway hysterical crying?), or she's realised she doesn't like the dark (no issues daytime naps in dim room, but night-time room is pitch black?), or she's become old enough to be aware of me not being there (bf to sleep/ not put to bed awake?), or something else- any ideas would be really appreciated!