Is hemp extract equivalent to CBD?

I searched on Amazon for CBD and all these hemp products came up so I ordered hemp infused water. It does seem to help my spinal stenosis back pain and leg muscles. There are 3 mg in each 16 oz bottle and I only down about half at a time. But is it equal to CBD? I’m a long way from an actual medical marijuana store but I could make the effort to find one if I’m not getting all the benefit I might get from actual CBD. I would appreciate some education on this.

No.
Many hemp extracts contain no CBD.
Those that do will say so.
Laws still vary from state to state, but I’d expect you could order online from any state in PNW.
Therapeutic concentration is usually 500mg to 1 gram in a 30 ml bottle of oil. 1 ml dose.
Amazon does not carry the stuff.