Feeling down

Does anybody else feel like they are failing at this whole motherhood thing. My baby is almost 6 weeks, also my 3rd baby, and sometimes I just feel like I am completely failing. I get frustrated at times, especially with my boys when they’re loud and baby is sleeping and I hate that I do get like that. I feel like I can’t spend the time like I used to with them. I have such a wonderful husband who does everything for our boys while I tend to the baby, he also helps with baby whenever I need. She isn’t the greatest sleeper at night, real fidgety after her 3/330 feed so that makes things a little more stressful. I know this phase passes since I’ve done it 2 other times but sometimes I can’t help but want it to hurry and pass, and I feel so guilty for thinking that. This is my last baby and I wanted to enjoy all these moments but I’m having a hard time doing so at times. Please tell me I’m not the only one!