LEE13B

Hey looking for input on what may be wrong with my mazda..........i have a 1984 mazda rx7 gsl se...it was running fine all day but at like 10 30pm I went to leave from work and the car started right up as usual but was idling really bad it started and hit about 3500 rpms then dropped to zero and died I finally got it going but every time I pressed the clutch in it would drop to 0 rpms and die.....when i push my pedal in to get gas there is a pretty bad delay....once I finally managed to get driving the problems continued until I set my cruise control then everything ran fine but then my brights decided to become temperamental and only want to work about half the time I turned them on ..... every time I went to shift I would also get ridiculous backfire my rpms are also not reading corectly the guage jumps all over the place ......out of nowhere my radio also decided to start working when it never did before......there are NO MODS this car is 100% Stock and NONE of these problems have ever happened before now please if you may have an idea to what's going on let me know in in desperate need of help.