Struggling hard at 8 weeks postpartum

My husband and I are arguing way more than normal. I have been running on 2 hour intervals of sleep at night and my baby hardly naps for 20 minutes all day long total. My milk supply is dropping. I have no paychecks other than my husbands coming in until April. We are financially tight. I have no energy to do anything and my life feels like an out of control rollercoaster. I want to breastfeed but am feeling defeated by it and all I want to do is cry. Is anyone else having a hard time? My baby seems to never sleep and it’s literally killing me to have no time to myself or time with my husband. Please don’t comment if you’re going to be rude or judgemental because I just need support right now.