Pregnant with #2 and freaking out... :(

Alright ladies I'm pregnant with my second child. I have a two year old daughter already and by the time this baby is out she will be closer to three. Now the only thing left to accomplish with my daughter really is potty training which has been going quite well the past few weeks. But as I've been babysitting my nephew more and more and I have my daughter with me each time I'm starting to get more and more panicked....I'm starting to doubt that I can do it with two children....I'm not sure what to do....I'm scared and worried that I'm going to mess up or not show one of them enough love or be too stressed out. Not to mention my SO. I feel like people are going to get mad at me...or I'm not going to be able to do everything I'm supposed to...I just don't know.