Separation Anxiety

My mother has come back to Jakarta two weeks after eid picked up by my younger brother who has a good stay with us for a week. The day after, cousins came to visit. I just realized that separation anxiety has stricken when I left S playing my cousin sister, while I have a quick wash. She frustratedly cried for ten minutes when I was in the bathroom, and then suddenly stopped after seeing me again.

I just didn't realize that it has begun long before that..

When she's 9 months old, or when she started to stand up holding to the furniture, she suddenly refused to be tucked in her crib at night. She kept waking up, standing by the railing of her crib, and crying.. asking to be carried. I nursed her to sleep again and I put her bed when she's already asleep, only to find that another hour she woke up again. This really made me tired as I've lost couple hours of my deep sleep, made me frustrated during the day. What happened to my sleep trained baby who used to sleep through the night?