4 month old fits!!

Anna

My 4 month old started throwing fits 2 days now ! Like she wants my boob then rips off and screams! We've tried everything. My mom thinks I'm going through a change were my milk supply lowers so baby not getting enough to eat. I have a stash in the freezer so tried bottle feeding her. She hates it as soon as we put the bottle in her mouth. She loses it. !! I need suggestions please. My nipples are sore last night she was on my boobs from 3 am till about 9am non stop. I dont k ow what it could be