Hamstring injury or something else?

[Anonymous]

In the past week or so I've developed a pain in the back of my thigh that runs from just above the knee to just below the buttock. It's not immediately straight up the back where I'd immediately say hamstring pull, but instead offset a bit.

Not sure if this is a hamstring injury that rest and stretching will heal or if I have a nerve issue. Googled sciatica but I have no back or buttock pain. It's at its most painful as I contract it to first stand and take the first step or two, or as I am actively lowering myself to sit.

Any thoughts? My doctor's office doesn't have a nurse's line, and I can't get an appointment until Monday.