My wife gave me an HCG shot about 5 days ago and the sight has become moderately painful. I've never had a problem before. Wife's a nurse and knows what she's doing. Injected 500iu's with the diabetic needle in the belly fat. I can't feel a lump and there's no swelling or redness, just a moderate dull pain that's sensitive to touch. Slowly gotten a little worse but not really bad. Should I be concerned?