Strange feeling bottom of foot like I am stepping on something has been 1 month Changed brands of socks got professionally fitted shoes?

It takes some nerve. Strange feelings on the bottom of the foot, as you have described, are due to some type of nerve involvement. Your description sounds as though you are developing a inter metatarsal neuroma. This is an enlarging of a nerve that is now sending confusing signals that you perceive as something you're stepping on. Changing shoes was the perfect first step for resolution. Seeing a specialist is next.