Feel like I’m going crazy😭

Man it’s really hard to think positive and think that this all gets better... my baby DOES NOT SLEEP at night. I feel like I’m going crazy. I don’t get much help.. my partner sleep for 12 hours sometimes, most of the time he sleeps through the night. And then he’s out of the house 2-3 days in a row working 12 hour shifts, alternating nights and days so I always have to be up. My baby also doesn’t nap very well. He’s so gassy, between constantly grunting (from pain not bc “it’s normal newborn behaviour” -sick of hearing that one) and squealing all night and day, also pretty sure he has reflux because I can burp him for hours (usually try to burp/keep him upright for about 20 minutes) after a feed with large burps, and as soon as I lay him down he’s gagging and choking on spit up which causes him to squirm and squeal and grunt even more. His belly gets so rock hard from how uncomfortable he is. His doctor is useless because I mentioned all of this, and the fact it’s disrupting his sleep but she brushed it off. Well now it’s starting to disrupt his eating. He will eat for 2 minutes, gag and pull away and fall asleep and then he gets cranky because he wants to keep eating. All of a sudden the last 3-5 days he hasn’t been latching properly and just kind of puts the tip of my nipple in his mouth. And then because of the way he’s eating it’s making his gassiness worse. I’ve tried formula and bottle feeding (I supplement occasionally) however it’s almost as if it never fulfils him because he wants to suckle for comfort afterwards. This is just getting tiring and I can only run on such little sleep for so long....I don’t know what to do because I’ve become a very angry person and I’ve been having horrible intrusive thoughts and I just don’t know what to do anymore. I’m at my wits end. I’m hallucinating. I feel like I’m going crazy. I feel like a single parent because I’m basically doing this all alone and nobody listens to me, just tells me “this is normal”.