Can a groin strain devlop into anything else?

Playing sports last week i incurred what i guess is a groin strain, its almost a week since then and i still have a bit of a limp and pain when i try and stretch a little. But my real concern is that fact a bruise has appeared in the past day and that i have also felt some uncomfort further down my leg and also up a bit higher on my left hip, its a different pain/uncomfort that i felt in the first few days. Any ideas or is this normal