VP. For nymphing, you sound like your using the style I teach (or taught anyway) and that's banging the hell out of everything that even twitches your indicator. That's good, trust me. And no, the fish don't spook from your line spalshing the water when your nymphing or I woulda never caught a dang thing, and I got my fair share. I was probably the noisiest nympher the river had ever seen at the time too. I guess it all depends on the water you in though, becuase if it's slow deep stuff they might spook, and if it's riffley, there not going to. So I'd say... adjust your angle's so that you have nothing behind you, or wade out a bit so you have nothing behind you and can make shorter casts into the fishy water... and keep at what your doing. if that's not possible, try the things like strip setting (rod tip low, strip a yard of line when you see any movement on indy if it stays down smash it with a hookset).