I've noticed since bringing my little one home that once they've gone to sleep. I begin to feel nervous about when they'll wake up.
Because their sleep times can be long or short at the moment (7 weeks old) I've found it hard to get anything done that's significant in between. Mainly because they either wake up whilst I'm in the middle of doing something or I feel too nervous to get up to do anything.
This has led to me locking into place and staying put, not wanting to move or do anything and just sit and wait to see if and when they wake up.
Only time this doesn't affect me is at night when both of us will be sleeping. I don't know why this affects me so much because so far they've been okay sleep wise during the day and I know roughly how long they'll sleep for.