Pain in my lower back down the back of my left leg, is it a torn or pulled ligament?

I have a pain in my lower back down the back of my left leg. Feels like a cramp sometimes. I dont remember hurting it. Just started to happen 3 days ago. When I walk my left foot is difficult to lift. Toes don’t want to raise up. Is it a torn or pulled ligament in my foot?

Age: 45
Female
Medications: Cypro BP meds