Where has my good baby gone

My child is slowly killing me off! For the last week she just cries from morning until night, then cries some more! I'm literally looking hotels for a weekend away by myself just to escape it all!!! She will go down for about 2 mins max at a time to play on her mat or sit in her chair. Then she will scream the house down until I pick her up.. Then she's fine. As soon as I put her back Down she screams again! I've tried leaving her cry it out for a few minutes but she just gets louder 😩 bedtime used to be great, she would go down and go to sleep very good. Now she's a nitemare! And when she finally does fall asleep she's awake more or less every hour, not for food... Just awake fussing. Its soooooo draining it's actually depressing me because I know when I wake up in the morning my day will be exactly the same as the one before. She's 4 months and oh my god I'm praying this passes soon or I will seriously end up in a straight jacket 😂😂