Wierd pain in my left foot, right in the arch to the inside. kinda sharp when i extend my leg too far, like there's a thorn in my sock, sometimes almost like stepping on a lego but on the side, or like a string being pulled tight around there. ideas?

Your description sounds like plantar fasciitis. That is information of the tight fibers on the bottom of your arch When there is a lack of support which can develop as we get older the plantar fascia will stretch and pull on the attachment on the calcaneus or heel bone. Stretching the Achilles tendon is important in this condition along with proper arch support. A podiatrist very helpful

Dr Kuitems agreed

It sounds like Plantar Fasciitis.