As I have already said, best thing to do is visit your doctor, because no one can assess your condition without a close examination and in fact I am a professional an all I wanted today was a nice pair of vintage pedals!
wrong forum mate! but since you posted... My best guess, from what you are describing, i would say you are suffering from inguinodynia, however, surgery being done 5 months ago makes me think. Best thing to do is visit your doctor.