Tito,
When my confidence is low, I go through my old records and look at my successful seasons. Nothing worse than be apprehensive on pulling the trigger due to doubt in your abilities. Can't tell you how many time this has reminded me that I have been betting and beating the markets for 10+ years. Sure I have had some losing seasons, but the sample size is large enough to remind myself, that my core competencies are solid.
Good Luck tonight. One month from now when you are +16 units, you will be laughing at the thought of losing confidence. Keep up the good work.
P.S. A simple reminder of what you can do: Check your NFL record this year. That was ONE HELLUVA run.