Problems about my toenails??? plz help!?

Since the summer, i realized my toenails were turning weird, like they'd be yellow, pale, gross looking, and if i see them from an angle, it looks like horizontal lines, and bumpy....like horizontal speed bumps, not ridges. On the second toe on my right foot, theres this yellow bulk of excess nails on top, and it just looks like a bubble forming, but its not empty, like a mound (not very thick) on top.....what could all this indicate? especially the horizontal lines?