Thigh pain. To my physiotherapist said?

I have thigh pain in both side above knee since 2 years back. pain is most in my in my inner thigh n lateral n front of thigh bt most in my inner thigh. In inner thigh pain is start from groin area or top of thigh area n than goes into inner thigh...pain is not too much bt its a irritating pain most of time...during Sleeping pain is increased. I consulted 4 orthopaedic doctor n 1 neurologist doctor did ls spine mri..hip n pelvic mri n ct all reports comes normal. N also take 40 days physical therapy bt not effective little bit. So plz tell me what the problem is associated with me?? Is that 1. Groin muscle strain/pull??? 2. IT BAND problem according to my Physiotherapist said??? Thx for replying as soon...