Need some advice seconding guessing wanting baby #2

So we have been trying to conceive since December when my daughter turned a year old. Well it's now coming up on a year and I'm not sure if i want another child anymore..... idk why or where this is coming from but I'm second guessing this decision we made. When we started off i was so excited to give my daughter a sibling but now i wonder if its a good idea. Has anyone had this second guessing your choice? How did you figure it all out in the end? Could really use some advice been thinking about this all week. Thank you appreciate it so much