How do I know when God is talking to me?
I would suggest that God is talking to you if two of these three conditions are met:
a) "God's voice" is persistent.
b) It comes from several different sources.
c) What it is telling you to do is out of your "comfort zone."
My personal story begins when I was a senior in high school. I had to make a decision on which college to attend. I woke up in the morning with college A on my mind. By evening, I decided that I was going to college B. The same thing happened the next day. This went on for two weeks. Finally, I got the message. I was going to college A. God is persistent.
When you hear sources – people, books, Facebook, magazine articles, YouTube – from different areas of your life saying the same thing, PAY ATTENTION. God might be trying to get an idea across to you. I remember reading in an article that ecumenism starts from the ground up. A few weeks later, after Vacation Bible School, my 3-year old son told me, "Our church has Jesus loves me. The Methodist church has Jesus loves me too!" All of a sudden, joining the ministries of the churches in town became a higher priority.
Back then I wasn't a prophetic, visionary sort of preacher. I learned to be. It was not in my comfort zone. I had found working with pastors of other denominations intimidating and uncomfortable. I learned to get over it. By the time I left, we ran a joint Vacation Bible School, a joint choir, a joint men's prayer breakfast, and a SHARE food group. I was not in my comfort zone, but God had other plans.