DP has 2 kids from his previous marriage and I've got 1, we just found out last week that we are expecting our own baby, we're very excited 
I love his kids, they're lovely children and he is the most amazing dad.
But I'm worried about how it's going to work when baby comes along. When I had DS I was on my own so I could do as much or as little as I pleased, it was lovely n laid back n quite chilled out. But this time there's going to be 4 kids in the house at times n I'm not sure if i want that every single weekend. He has them overnight 2 nights a week plus sees them 2 other nights a week, i I'm worried he's not got enough time for our baby and my house is small, it's going to be so stressful having 3 kids + baby here every single weekend.
Before I was pregnant I always had the attitude of 'the more the merrier' but right now I just want an easy life.
I feel so bad for feeling like this, I know a lot of it is just my hormones. But I know I will want some time just me, DP and our baby but with his work patterns and the times that he has the kids we will only get 1 Sunday a month just us.
I know I am being totally unreasonable and I can't really discuss it with DP as I know it'll sound like I'm a total bitch, but at the moment I feel like I just want him to myself.
Anybody else felt like this? Any advise other than to pull myself together?