i did that, but it's easy - just concentrate on feeling the note - if you hear a song play along - find the same note(s) - you will get it and it will make everything else so much easier - the first thing you do is always find the right key the instant the song starts playing...it's all just sweeping pattens that you have to know (or you can try to "feel" how many frets up or down a certain next note will be, I do this a bit)...
fast guitar solos on recordings always sound a little daunting, I don't know how to say it but i've found my greatest progress when doing nothing at all...just suddenly trying something and going with it...if you continue in that way, you will find a lot of tricks from simply playing around...for top speed it always saps the creativity factor, and desperately so with lightning fast runs, but it helps to do a run with the fastest picking you can do at all, and then come back down and start to play some other stuff once you are reacquainted with the mellow mode...it's like blasting around on the highway, and then coming into a playground zone, it should be a lot easier, and will allow ample room for spontinaeity