I Have No Idea What To Do

I know everyone said that the newborn stage is the hardest but I never realized how hard. My little guy will be 6 days old and he feeds and naps really well during the day, but in the evening/at night he just won’t sleep unless he is in the bed with me or attached to my boob and will fuss and cry if he’s not. My husband and I are so tired especially me. I didn’t want to co-sleep but it looks like that’s what’s happening. I keep catching myself thinking I maybe we should have waited but even if I was 30 it wouldn’t make this any easier. I find myself wishing we could go back before this, but we can’t. I’m just getting to tired and frustrated. I don’t feel like myself at all. I’m freaking out. I love my little guy but he’s driving me crazy.