Flying through a Valve adjustment, and discovered why car was running BAD!!!! Options

[Noodles]

OK first off I'm a complete noobie. Have had my teener for about 2 months now so I'm learning everything as I go.

Today I tore off my valve covers because car started running very badly. Had a big miss and lost almost all power. Was adjusting valves starting at 1 and working my way around, had a few that were in need of adjusting then I got to number 4 and found this.

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1028.photobucket.com-14688-1346548525.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i1028.photobucket.com-14688-1346548525.2.jpg)

The nut was sitting in the bottom and the washer is just missing. Ran a magnet around and just no luck finding it. Dont know if its in the bottom end or what.

I got some new washers and tightened it down but now it pushes the rocker down to far once its good and tight, (I think thats what its called, like I said I'm very very new) and I cant get a feeler gauge in to adjust the valves, Its pushed way down below the spring and very tight. I can move the far right one but the one on the left wont budge whatsoever.

Any help and advice would be much appreciated. Am I going to have to tear this all apart and redo it or am I just missing something easy?