2nd thoughts about having a baby?

Me and my husband are trying to have a baby it's only our 2nd month trying. I feel like I'm starting to get second thoughts about having a baby and that we should wait longer? Things are starting to go well at my job and I finally have a couple friends for the first time ever and I am worried that having a baby I'll miss out on experiences with it all. I still want a baby but I also want to do all the things that will go on this year with pool parties and couples vacations. Am I being selfish? Has anyone else had 2nd thoughts about maybe waiting to have a baby? I'm 22 and he is 23. He is beyond excited to have a baby asap but now I wonder what we will miss out on if we do.