According to your sign and symptom it indicate that you have some problem around your inguinal area but what's exactly it's can't say as usually so for correct diagnosis you should take consultation from a doctor .
You should do next level diagnostic as CT scan and MRI to find out the exact cause.
Next Steps
You shouldn't loose hope because every disease have definite treatment.
Health Tips
Please keep positive attitude to fight any disease and any problem of your life .