In The Crease Of My Left Leg, I Have Discomfort

In the crease of my left leg, I have discomfort at night when I turn onto my side or back. It almost feels heavy and is an effort to lift and turn. Once I get situated, it is ok. In the same leg, I get a stinging/burning at times when I am sitting still. It is on the upper outside of my thigh. I do think I am having some problems with my sciatica. (pain in my bottom when I am exercising and sitting still) Could both of the other symptoms be related to that??