Extra slow flow nipples?

I am a FTM and my baby will be a month tomorrow. Unfortunately, my milk supply has plummeted so we have to switch to formula. We have tried MAM, Dr. Brown’s and NUK bottles, all in the 0 nipple size, I’ve even tried to use the bottles they give you at the hospital. My baby is having issues eating, when she eats, the milk is spilling on the side of her mouth, she’s making clicking sounds cuz she can’t latch good on the nipple since the flow is too fast for her, she coughs when milk builds up in her mouth and sometimes she gags because it’s just too much for her. Pace feeding does not work with her as she experiences the same difficulty no matter how we try to feed her. I need help, idk what to do anymore. I’ve tried looking up different nipples and bottles but have not had any luck. She gets frustrated and cries the whole time while feeding and then gives up. I’m worried she’s not eating enough. 🥺🥺🥺😭😭😭😭😭 Has anyone dealt with this? Does anyone know how I can help her feed slower?