What kind of custody would I get if my child is living with his father and I recently moved to Florida?

Me and my ex share a 4 year old son. We were never married and don't have court involved with our custody matters. I recently moved to Florida. Before I moved, I asked my son where he would like to live and he wanted to stay with his father in Indiana. We had a verbal agreement stating that I would get our son over the summer and some holidays. He would have our son throughout the school year. Now that I've been in Florida for 4 months, he's decided that I can't have our son for more than a week at a time. I haven't been able to get my son yet. I'm seeking legal advice in this matter. I've had contact with my son on a weekly basis and need to know what kind of rights I may or may not have. Neither one of us pay child support as agreed upon when we separated. Thanks