How do you know God's will for your life?

When ever I have an important decision to make I always take my thoughts to God through prayer. I would like to say I always know right away what to do, but I never know. I ask for things through prayer and then when my prayers are answered I freak out. Mostly at the unknown. I wonder if this is really what is best for my family. God does answer me. I just am not listening. Most times the answer is right in front of my face, but my thoughts and the distractions of the world consume me so I quiet God's voice or completely block it out. I know I need to work right now for financial reasons. I know I want to work because my days are consumed by boredom. With all the kids in school all day, the days are quiet and lonely. I want to be around people. I want to work in a doctor's office. After many prayers from friends and family. I got just that a job working in a physical therapist office. Now, that my prayers were answered I am terrified. I am pretty sure I will like the job. The pay is very good and it has awesome benefits. The people I am working for seem really nice too. This is all so new to me. A full time job working five days a week from 8am-6pm. This will change our lives in a very good way. We won't have to worry so much about money anymore. It will be a huge burden lifted. Why do I always second guess myself? I will only be loosing two hours a day with my kids. So like 10 hours a week less that I will see them. I should be happy. But, I do have to say I feel a sense of guilt about leaving them even for that short amount of time. They have a parent lunch coming up in a few weeks and I will be working so I will have to miss it. This has never been an issue for me before. I was always able to go everything they had. I don't want them be mad or sad that I can't make it. Also, when do people who work find time for things like Dr. appointments? I know deep down in my heart this job is the best thing for me and my family. I guess the 18 years of me being a stay at home mom have me feeling like I am trading that life in for a new one. Which in a sense I am. I know that God has directed me to this job with this place. Now, if I could only quiet the outside influences and my own thoughts so I could let God's voice be heard.