I need help, please!!

My little girl is 9 weeks old and my god am I struggling.

She used to be so happy and content, she slept well, fed well and was just an absolute angel but for the past week she’s been a completely different baby.

I struggle to get her to latch, she isn’t sleeping and I’m finding myself so short tempered which is making me depressed because my god, she doesn’t deserve this.

Over the past 3 days I’ve had a total of 6 hours sleep. She doesn’t nap, so sleeping when she does it out of the question and she only sleeps for 3 hours at night And ONLY IF she’s in bed with me. I’m exhausted. I’m lost. I’m scared.!