Someone PLEASE ease my stress

I'm a mom to a wonderful and fiesty girl (2yo). I'm planning on trying for our second in the coming months and I'm just freaking out.

My LO was a terrible newborn. Screamed constantly if she wasn't on the breast or sleeping on me. I legit got nothing done for MONTHS because all of my energy was spent on her.

I feel like I can't handle two kids. I want two so so badly, but I'm becoming extraordinarily hesitant because I'm so stressed over my abilities. I also have an anxiety disorder, which makes me even more nervous.

Any moms of 2 (or more) wanna tell me it's not so bad? Tips that make having two a little easier?