Torn Mamas

Help! Here’s my situation. I have an amazing almost three-year old daughter and a captivating 1.5 year old son. I will spare you the long heartbreaking/amazing story of how they came to be, but please know that the road was not easy (from a fertility/miscarriage/etc. standpoint). Hubby has only ever wanted kids, and I knew this when I married him (which made not being able to give them to him for so long so much worse). We’re ttc for #3 now. Problem is, I know deep down we’ll need to do fertility treatments (already on 2nd cycle since quitting BC, and my cycles run long, so we’re just wasting time...but fertility doctor is downtown and feels like a big commitment to start that up when I’m already overwhelmed with work), but I’m working full-time (civil engineer) and have huge work changes going on that stress me both on the work side and on the personal/emotional side. I can only handle so much. I know in the long run my family will be most important, but it’s hard to be fully aware of that when I’m currently the sole provider for our family of four (hubby is an awesome man who is in training for a new career so I don’t fault him for that by any means). In my dreams, I have a simple life, where I’m able to focus on my kids and husband and make their lives amazing. In reality, I’m on my third night away on a business trip, being faced with huge changes and challenges and wondering how I can possibly be the superwoman that I apparently need to be. My question is simply this...would you prioritize scheduling fertility treatments, even with all the current stress and work load, or would you be happy with what you have and see how things work out naturally, fully knowing that you might never be able to have more kids without intervention? Also, how do you balance both advancing as a professional and growing your family at the same time?