Screaming toddler

We have an 18 month old little girl and I am 7 months pregnant with our second girl. Recently my 18 month old has started to scream when she wants attention, doesn’t get what she wants or is upset. I know this because she can’t put into words what she wants or what is wrong but the screaming is unbearable some days. I have gotten down on her level and told her that hurts mommy’s ears, to use indoor voice, not given her any attention, and trying to distract her with something else but it’s really wearing on me. She was so bad today that I had to leave the room to take a deep breath so I wouldn’t loose my cool. Help I need advice on what I can do when she does this!!!

TIA :pray::purple_heart: