I did my shot yesterday morning and it went the same as normal but today my muscle hurts much worse than normal and is swollen and warm to the touch.  Should I be concerned or at what point should I be concerned?

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Did you just start a new vial of T? Could it be suspended in a different type of oil?

Same vial I've had for my last 4 shots.

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That's happened to me before. By chance did you maybe wiggle the needle at all once it was inside your leg? That's what I think happened with mine. Ibuprofen and an ice pack should help reduce the swelling and warmth. Gently massaging it should help with the soreness.