Horrible Lower back pain caused by gym. Pain shoots down my calf. Lately I’ve been having a sharp pain for. 1/2 sec above left eyebrow and in neck.?

See below. There are many causes of neck and low back pain. They are usually separate issues, but in some cases neck and shoulder pain are connected. A pinched nerve in your back can cause pain down your leg into the calf muscle. See your physician for a full workup.