I woke up this morning with a really sore left lower inner thigh. no trauma to it prior. feels tender to the touch, but not bruised or swollen?

Muscle strain?: You may have a strained thigh muscle or tendon, most likely one of the inner quadriceps. If you feel pain or stiffness when you stretch and/or contract this area, you can be pretty sure that's what it is. Still, if you notice persistent soreness for a week or more, or if you notice swelling, heat or redness, you should see a doctor. Best wishes.