Hi,

It would seem to me, from the limited info you have given us and the fact that we can't see you in person, that you have hurt your back and that the 2 are linked in some way.

Often the hamstrings are affected by the back in that the nerves or protective muscle spasm can overload the hamstrings causing it to be easier to be injured.

I would suggest you go see a good physio who can examine your back, your hamstrings and tell the difference between what is causing what.

Your problems are linked...i would bet money on it

Cheers