Career vs kids

I'm so torn! My 15 month old wasn't planned. In fact, we were going to wait until we were about 30 because hubs and I are super career driven and wanted to be established before starting a family. At 24, I found out I was pregnant right after being offered a management position at work.

I am so happy I had my son when I did and I believe I'm better at my job because I'm a mother... But the question of if/when to go for baby #2 is really tearing me apart. I have major baby fever (I have since 3 mos postpartum) and we've talked about trying this summer.

The problem I keep running into is that I'm progressing in my career and most of the senior management and executive team are getting ready to retire (in the next 5 years) and I want to set myself up to move up the ladder. I've only been back at work for 3 months and I'm busting my butt and I know I'm amazing at what I do (sorry if that seems conceited... I've fixed some major problems no one could figure out and I have stepped up and filled the shoes of a senior manager who is currently on leave).

Am I crazy for worrying about missing my opportunity to progress at work if I have another baby? How do you find the balance? I'd love to hear your experiences!