Hey UG.

I've been playing guitar self-taught for about 2.5 years, and I've been told that I am very good for the amount of time I've been playing, without lessons. But, I have found that in the last 4 months or so, I haven't been progressing very much... I want to start doing some faster solos, but just can't get a hang of speed. As of now, I can play solos like Nothing Else Matters and Hotel California very well, but I want to get into some faster stuff, like some Megadeth solos. I'm worried that somehow I'm teaching myself the wrong technique. So, is there anything I should be practicing, like scales or something? Can anyone point me in the direction of some online lessons maybe, that will teach me to build up speed? Anything that will help me with technique or speed would be appreciated.
Me duele todo el cuerpo por los errores
Presionados por la lujuria
Nos mentimos tanto el uno al otro
Que en nada confiamos