So stressed

Oh mama, please don't give up, you are doing so well carrying this all on your own, and one month plus of this must be genuinely exhausting. A few of us went through something similar around that age, and what helped was checking a few things: whether baby might be teething early (yes, even at 3-4 months some babies start), whether she has any silent reflux that the PD might have missed, or even just gas discomfort making feeding uncomfortable for her. One thing that worked for some mums I know is trying to feed in a very calm, dim room with minimal distraction, since babies at this stage can get so easily overstimulated that they just refuse the bottle outright. It's also worth trying a slower flow teat even if you think the current one is fine, because sometimes the flow is slightly too fast and baby gets frustrated or gassy without us realising. Do hang in there, the drowsy feeding is okay as a temporary measure to make sure she gets enough, and this phase does usually pass. That said, since it's been going on this long, it's really worth going back to your PD or asking for a referral to a lactation consultant or paediatric specialist just to rule out anything else, you know your baby best, and it's always okay to push for a second opinion!