Really need advice 😭

Idk where to post this!

I have a 21 month old and a 7 month old and keep getting stressed and shouting at them as I want my house all clean by a certain time and kids to go to bed at a certain and nothing goes to plan and always seems to feel like I'm failing!! I'm now pregnant again and scared I won't handle it! Just because I get so stressed and shout at my kids which I hate 😭 my partner now doesn't want the baby so I feel sostuck