is it easier with more kids?

Kimberly
We've had a tough couple of weeks in our home with our little guy. He was really sick and then he has had a hard time sleeping so he's been sleeping in our bed with me and my husband has been sleeping on the couch. It's not ideal.
We're going to try a big bed for him. It comes Friday so I'm excited for that.
I've had a really tough time since having our little guy. I've always wanted a good amount of kids. I got married a bit later in life so I won't be able to have as many as I originally want unless I adopt. 
I've been feeling really overwhelmed the last little while and am losing confidence in myself. If I'm feeling this overwhelmed with only one child, how am I going to be able to have any more?! It makes me sad. It makes me feel like I'm failing or like I'm worthless.
I've heard it gets easier with more kids. Have you found that to be true? Please share! I want to know realities.