J.C.
All drug store carry a drawing salve you could try. http://reviews.cvs.com/3006-en_us/705149/cvs-pharmacy-cvs...
I am a glass artist and several time a week I typically have glass in my foot (I work in flip flops). I rarely bother to take the glass out myself unless it really hurts or appears to be deeply imbedded. So far, the glass has always just worked itself out of my foot.