I'm a runner and I have a pain in my left foot from my big toe my arch. I have iced and stretched it but nothing has helped it's just getting worse.?

See Podiatrist. For evaluation, diagnosis and proper treatment. May be the result of inadequate foot support. Can try inserts and new running shoes in mean time. If there is swelling, get medical attention before doing anything else to rule out more severe injury to bone or soft tissue.
It might need help. It sounds like what you are describing is (medial band) plantar fasciitis. Stretching, ice, rest, over-the-counter arch supports and medicines like advil/motrin/aleve are good starting points. If it is not being helped, see a podiatrist. Prescribed medications, injections, custom foot orthoses and/or physical therapy are sometimes necessary.