For months now I have experienced lower right-sided pain, I feel its internal, it wakes me up in the night and I have to lay on my back to ease it, the pain is also in my lower back, worse on the right but it limits what I can do during the day as the pain is intense. I've had a full hysterectomy and my appendix removed. I'm 45 yrs old, not overweight and feel much older body wise. Should I be concerned?