Help!

I need a miracle in my life 🥴 I have two kids , one is 2.5 years and the other is 11 months. They are currently sharing a room or at least im trying they do.

The baby is having a difficult time getting sleep trained, he still wakes up 1 or twice at night. The toddler on the other hand was sleeping just fine until about a month ago or so that she refuses to sleep in her room or if she does fall asleep there she would wake up and go to our room. Then if she wakes up she would take forever to fall back asleep and its so frustrating cause im literally not sleeping well.

Its come to the point that I feel Im going crazy. So the question is are there any sleep aid or calming aid. Or at least any tips on what could I do? Help a mom out!!! 😅